Destination guide

How to Avoid Roaming Charges in Bulgaria (2026)

Bulgaria is one of the easiest places to stay connected cheaply — if you skip roaming and use an eSIM. Here is exactly how.

Updated June 2026Prices verified weekly

How to avoid roaming

Some apps need VPN access in Bulgaria. AT&T charges $10/day for data that may not reach every service. Airalo offers 20GB on A1 Bulgaria for $17.03. 7 days saves $53 vs carrier roaming.

June 2026 verified3+ networksFrom $0.77/GB5 providers comparedUpdated June 2026

! Danger

US carriers charge $10/day or $2.05/MB for data roaming in Bulgaria. A single week of casual phone use costs $70–200+.

&check; Solution

A travel eSIM from Airalo connects to A1's 4G LTE network at $0.77/GB. Same towers, same coverage, no roaming middleman.

How to avoid roaming charges in Bulgaria

Some countries require device registration before foreign phones can access local networks. Without registration, even an eSIM may face service interruption after 30-90 days. AT&T does not handle this for you — and still charges $10/day on A1 Bulgaria whether your device is registered or not. A 7-day trip costs $70 in roaming fees.

Check IMEI registration requirements before your trip. For short visits under 30 days, most travelers avoid the requirement entirely. Install a Bulgaria eSIM while on home WiFi. A 20GB plan on A1 Bulgaria costs $17.03. Disable data roaming on your home SIM. After landing, activate the eSIM and connect to A1 Bulgaria without carrier markup.

What AT&T and Verizon charge in Bulgaria

One FaceTime or Zoom call uses approximately 1 GB per hour. At $2.05/MB on A1 Bulgaria in Bulgaria, that is $2,099 for a single hour of video calling without a roaming plan. A 15-minute check-in with family: $525. Even AT&T's $10/day Day Pass throttles after you hit your domestic data cap, making video calls stutter and drop. Verizon TravelPass has the same cap. A 20GB eSIM on A1 Bulgaria at $17.03 provides dedicated data for video calls at full speed — no per-minute roaming math, no throttle tied to your US plan balance.

What everyday activities cost on roaming in Bulgaria

Roaming vs eSIM cost per activity in Bulgaria (AT&T $2.05/MB vs eSIM at $$0.77/GB)
Activity	Data Used	Roaming Cost	eSIM Cost
10 min Google Maps	5 MB	$10.25	$0.00
10 min Instagram scrolling	50 MB	$102.50	$0.04
1 hour video call (Zoom)	1.0 GB	$2099.20	$0.77
Send email with photo	3 MB	$6.15	$0.00
30 min Spotify	45 MB	$92.25	$0.03
Check Google Translate (10 queries)	2 MB	$4.10	$0.00

What AT&T charges across a full trip to Bulgaria

A student spending a month in Bulgaria on AT&T faces $300 in roaming charges. That is $300 just for data, billed $10/day on A1 Bulgaria. A month of AT&T roaming costs more than a week of shared accommodation in most cities. A 30-day eSIM on A1 Bulgaria covers 20GB for $17.03 — saving $282.97 on a student budget. Students studying abroad or doing extended research trips should install an eSIM before departure. The carrier markup is not a student discount — it is the same $10/day regardless of age, budget, or trip purpose.

US carrier rates in Bulgaria

The fine print matters more than the headline price. AT&T's $10/day International Day Pass in Bulgaria: activates on first A1 Bulgaria connection, uses your domestic data cap, throttles to 128 Kbps after cap, resets at midnight Eastern. Verizon's $10/day TravelPass: identical structure, identical $10 rate, identical A1 Bulgaria network, throttles to 600 Kbps after cap. T-Mobile Magenta: no daily charge, permanent 256 Kbps speed cap, no high-speed option in most countries. All three use A1 Bulgaria's infrastructure. None provide data beyond your existing domestic plan limits. A Bulgaria eSIM on A1 Bulgaria provides a separate, dedicated data allocation: 20GB at $17.03. No domestic cap interaction, no throttle tied to your US plan, no midnight reset. The eSIM data is yours to use until the balance depletes.

How AT&T charges roaming in Bulgaria

When your plane lands in Bulgaria and you turn off airplane mode, your phone broadcasts a registration signal. A1 Bulgaria's nearest tower responds. Your home carrier — AT&T, Verizon, or T-Mobile — receives a billing notification from A1 Bulgaria within seconds. The $10/day International Day Pass activates at that exact moment. No app opens. No call connects. The network handshake between your SIM and A1 Bulgaria's tower is enough to trigger the full daily charge. This process happens automatically through the SIM card in your phone, bypassing any settings you have. The only reliable block is disabling data roaming in Settings before the handshake occurs — or removing the home SIM and using an eSIM on A1 Bulgaria at $17.03 for 20GB.

Phone activity you did not authorize in Bulgaria

Location Services on your phone ping A1 Bulgaria's towers every few minutes in Bulgaria. Find My, Maps, Weather, and ride-hailing apps all request location data in the background. Each ping transfers 0.5-2 MB. Over a full day, location pings accumulate 10-30 MB of silent cellular data. At $2.05/MB, that is $20-60 per day in charges you never authorized. Disable location services for non-essential apps before landing: Settings > Privacy > Location Services > review each app. Keep Maps and emergency services active, disable everything else. An eSIM on A1 Bulgaria at $2.21 for 1GB routes these pings through flat-rate data instead of AT&T's per-MB billing.

Airport SIM counter vs eSIM in Bulgaria

Bulgaria requires passport registration for physical SIMs. The counter agent photocopies your passport, enters your details into a local registry, and files the record before activating the SIM. This process adds 10-15 minutes per traveler beyond the counter wait time. An eSIM requires no passport registration — you provide a payment method and an email address. No government registry, no photocopy, no paper form. Plans on A1 Bulgaria start at $2.21 for 1GB. Install before departure, activate after landing, no registration paperwork required.

Order of operations: disable roaming first, then install your eSIM in Bulgaria

! Do this before step 2

Disable data roaming on your home SIM first. If your home SIM is still roaming-enabled when your eSIM activates, your carrier can charge both lines simultaneously. Settings → Cellular → Cellular Data Options → Data Roaming: OFF.

Disable data roaming on your home SIM

Go to Settings › Cellular › Cellular Data Options and turn Data Roaming OFF. This is the most critical step. Skipping it means Bulgaria roaming charges can still hit your home carrier bill.

Buy a travel eSIM

Get a plan from Airalo at $0.77/GB. Do this at home on WiFi before you fly — QR code delivery takes under 60 seconds.

Install the eSIM profile

Open phone Settings › Cellular › Add eSIM. Scan the QR code or tap the install link in your confirmation email.

Set eSIM as default data on arrival

After landing in Bulgaria, go to Settings › Cellular and set your travel eSIM as the primary data line. It connects to A1 within minutes.

Keep home SIM for calls via WiFi Calling

Your home number stays reachable for free over WiFi. You pay eSIM rates for data — 85–95% less than roaming.

Need help with device compatibility? Check eSIM compatible phones or our how eSIMs work guide before purchasing.

iPhone and Android guide for visiting Bulgaria

Dual-SIM phones traveling to Bulgaria require explicit data line assignment to avoid accidental roaming charges. After installing your Bulgaria eSIM, go to your phone's SIM settings and confirm that: (1) Mobile data is set to your eSIM line, not your home SIM. (2) Your home SIM has data roaming disabled as a backup protection. (3) Auto-switch or adaptive data routing is turned off. These three settings together prevent AT&T from charging through A1 Bulgaria if your phone briefly loses the eSIM connection. Your home SIM stays enabled for calls and texts over WiFi. The eSIM handles all cellular data on A1 Bulgaria at $2.21 for 1GB. 5G is available on A1 Bulgaria — your device connects automatically if your plan includes 5G access.

Device-Specific Roaming Settings for Bulgaria

iPhone Settings

The safest landing sequence at Sofia (SOF): keep Airplane Mode ON when the plane touches down. Do not disable it until your eSIM is ready. Step 1: enable WiFi while still in Airplane Mode (Settings > WiFi ON, or tap the WiFi icon in Control Center). Step 2: connect to airport WiFi to verify your eSIM profile if not already installed. Step 3: go to Settings > Cellular > confirm Data Roaming is OFF on your AT&T or Verizon line. Step 4: confirm your e-SIM is set as the Cellular Data line. Step 5: disable Airplane Mode. Your iPhone connects to A1 Bulgaria through the eSIM. AT&T sees no data roaming. No $10 trigger. The eSIM costs $2.21 for 1GB on A1 Bulgaria. Total time: 60 seconds.

Samsung Settings

Samsung Galaxy S24 and S25 run One UI 6 with a dedicated SIM Manager. Open Settings > Connections > SIM Manager. Tap your home carrier (AT&T, Verizon, or T-Mobile). Toggle Data Roaming OFF. This prevents the $10/day charge when your Galaxy connects to A1 Bulgaria at Sofia (SOF). Install a Bulgaria eSIM: Settings > Connections > SIM Manager > Add eSIM. Scan the QR code or enter the activation code from your eSIM provider. After installation, tap the eSIM entry in SIM Manager and set it as your Mobile Data line. Your home carrier handles calls and texts. The e SIM routes data through A1 Bulgaria at $2.21 for 1GB. Over 7 days: $67.79 in savings versus AT&T.

Pixel Settings

Google Pixel 9 and Pixel 8 on Android 15: open Settings > Network & Internet > SIMs. Tap your home carrier (AT&T, Verizon, or T-Mobile). Toggle Roaming OFF. This prevents the $10/day charge on A1 Bulgaria in Bulgaria. Install a travel eSIM: Settings > Network & Internet > SIMs > Add SIM (or download from your provider's app). After scanning the QR code, return to Settings > Network & Internet > SIMs and tap the new e-SIM entry. Set it as your mobile data SIM. Your home carrier handles calls and texts. The eSIM handles all data on A1 Bulgaria at $2.21 for 1GB. Pixel phones support per-SIM roaming toggles, so roaming stays OFF on your home carrier and ON for the eSIM simultaneously.

Dual SIM Configuration

iPhone 14 and newer (US models) support two eSIM profiles simultaneously. Both your home carrier and your Bulgaria travel eSIM are digital. Open Settings > Cellular to see both lines. Tap your home carrier line: turn Data Roaming OFF, confirm Voice & Data is set to your home carrier. Tap your travel e SIM line: turn Data Roaming ON, confirm it is set as the Cellular Data line. Go to Settings > Cellular > Cellular Data and select the travel eSIM. Verify: your home carrier shows "No Service" or "SOS Only" for data in Bulgaria. Your eSIM shows A1 Bulgaria with signal bars. A 1GB plan at $2.21 on A1 Bulgaria handles all data. WiFi Calling on your home eSIM routes calls through your US carrier at domestic rates. Total roaming charge prevention: $0. Total eSIM cost: $2.21.

Data Usage Monitoring

Reset your iPhone data counter before activating your eSIM in Bulgaria. Settings > Cellular > scroll to the bottom > Reset Cellular Statistics. This gives you a clean baseline for tracking eSIM usage on A1 Bulgaria. A 20GB plan over 7 days means a daily budget of 2.9 GB. Check Settings > Cellular > Cellular Data Usage daily to stay under budget. iOS does not reset automatically. Set a daily alarm to check consumption. If you hit 80% of your plan with days remaining, enable Low Data Mode and offload streaming to hotel WiFi. Top up through your eSIM provider's app if the balance drops to zero.

Roaming Avoidance Strategies for Bulgaria

WiFi Assessment

Airport WiFi at Sofia (SOF) in Bulgaria requires email registration and shares bandwidth across thousands of travelers. Speed rarely exceeds 5 Mbps during peak hours. A1 Bulgaria delivers 132 Mbps on cellular the moment you activate your eSIM after landing. WiFi availability outside the airport is good. AT&T charges $10/day to access A1 Bulgaria via roaming. A travel eSIM connects to A1 Bulgaria for $2.21 for 1GB. Skip the airport WiFi registration queue. Your e SIM is already installed and ready to activate.

Offline Preparation

Download Bulgaria in Google Maps before departure. Tap your profile icon, select Offline Maps, and download the regions you plan to visit. Offline maps include street-level navigation, Points of Interest, and basic search. This saves 3-5 MB per Maps session that would otherwise cost $6-10 at $2.05/MB without a roaming plan.
Save the local language for Bulgaria in Google Translate (Settings > Offline Translation > download). Offline mode handles text, voice, and camera input without cellular data. Pre-translate hotel addresses, dietary restrictions, and emergency phrases before departure. Store translations as screenshots for instant offline access.
Download entertainment before departure. Netflix, Spotify, and podcasts all support offline downloads. A 7-day trip to Bulgaria needs 5-10 hours of offline content for flights, transit, and downtime. Download on home WiFi. Streaming over an eSIM consumes 700 MB per hour of video, draining your plan quickly.
Install ride-hailing apps for Bulgaria before arrival. Create your account and add a payment method on home WiFi. The app download and account setup consume 50-100 MB that you do not want running through a carrier roaming connection.
Download an offline currency converter app with BGN (лв) rates. XE and Currency apps both support offline mode after an initial rate download. The local currency in Bulgaria is BGN. Pre-load the exchange rate on home WiFi so you can check prices without using cellular data at markets and shops.
Save booking confirmations, boarding passes, and hotel addresses as PDF files or screenshots on your device. Store them in the Files app or a dedicated folder. If your eSIM data runs out or you lose connectivity in Bulgaria, offline documents keep your itinerary accessible. Email attachments consume 2-5 MB each to re-download.
Save 112 as Bulgaria's emergency number in your contacts. Add your hotel address, embassy phone number, and travel insurance hotline. Store these as a contact card that works without internet access. Emergency calls work on any carrier network in Bulgaria regardless of your eSIM or roaming status.

Messaging Alternatives

WhatsApp is the dominant messaging platform in Bulgaria. WhatsApp is the standard across Western and Southern Europe. Telegram has growing adoption in Eastern Europe. iMessage is common among iPhone users but does not cross the Android divide. WhatsApp text uses 1-5 KB per message. Voice calls use 0.5-1 MB/minute. Video calls use 3-5 MB/minute. A 10-minute video call consumes 30-50 MB. Over a full day of moderate messaging and 2-3 voice calls, budget 50-100 MB. AT&T charges $10/day plus $1-3/minute for traditional calls. An eSIM on A1 Bulgaria at $2.21 for 1GB covers all messaging and calling via WhatsApp without per-minute fees.

Bill Shock Prevention

AT&T

Open the myAT&T app or visit att.com/international before departure.
Check if International Day Pass ($10/day in Bulgaria) is auto-enabled on your plan. If so, remove it under Account > International > Manage Day Pass.
Disable data roaming on your iPhone: Settings > Cellular > Cellular Data Options > Data Roaming OFF.
Disable data roaming on Android: Settings > Connections > Mobile Networks > Data Roaming OFF.
Install a Bulgaria eSIM before boarding: 1GB on A1 Bulgaria from $2.21.
Set your eSIM as the primary data line: iPhone Settings > Cellular > Cellular Data > select eSIM line.
Turn off Background App Refresh for non-essential apps: Settings > General > Background App Refresh.
AT&T Day Pass resets at midnight US Eastern time, not EET/EEST (UTC+2/+3). A late-evening arrival in Bulgaria can trigger two Day Pass charges in two hours.
After landing at Sofia (SOF): verify data roaming is OFF on your AT&T line and ON for your eSIM line.
Check your AT&T account 48 hours after return. Dispute any charges within the first billing cycle. AT&T occasionally waives first-time roaming charges.
Total AT&T Day Pass cost for 7 days: $70. Total eSIM cost: $17.03 for 20GB. Savings: $52.97.

Verizon

Open the My Verizon app or visit verizon.com/travel before departure.
Check if TravelPass ($10/day, 2 GB high-speed cap in Bulgaria) is active. Remove it under Plan > Travel > Remove TravelPass.
Verizon TravelPass auto-enrolls when your phone connects to A1 Bulgaria. The charge triggers before you clear customs at Sofia (SOF).
Disable data roaming: iPhone Settings > Cellular > Cellular Data Options > Data Roaming OFF.
Android: Settings > Connections > Mobile Networks > Data Roaming OFF.
Install a Bulgaria e-SIM before departure: 1GB on A1 Bulgaria from $2.21.
Verizon caps high-speed data at 2 GB per day on TravelPass. After the cap, speed drops to 600 Kbps for the rest of the day. The eSIM has no daily cap.
After landing at Sofia (SOF): confirm your Verizon line shows "No Service" or "SOS Only." Your eSIM line should show A1 Bulgaria with signal bars.
Verify no TravelPass charges appear on your Verizon bill within 48 hours of return. Call 611 to dispute within the first billing cycle.
Total Verizon TravelPass cost for 7 days: $70. eSIM alternative: $17.03 for 20GB. Savings: $52.97.

T-Mobile

T-Mobile Magenta and Go5G include free international data in Bulgaria, but speed is throttled to 256 Kbps.
At 256 Kbps: Google Maps takes 30+ seconds to load, ride-hailing apps time out, video calls fail, and photo uploads take 2-5 minutes each.
T-Mobile Go5G Plus adds 5 GB high-speed for $5/day. Go5G Next includes 15 GB/month at high speed. Check which plan you have in the T-Mobile app under Account > Plan Details.
Calls on T-Mobile cost $0.25/minute in Bulgaria. Use WhatsApp or FaceTime calling over your eSIM data to avoid per-minute charges.
Install a Bulgaria eSIM for full-speed data: 1GB on A1 Bulgaria at $2.21. Set the e SIM as your data line and keep T-Mobile for calls and texts.
T-Mobile's free 2G tier is useful for: text-only WhatsApp messages, basic email (no attachments), and low-bandwidth background sync. It is not useful for: Maps, photos, video, social media, or ride-hailing.
After your trip: check your T-Mobile bill for $0.25/minute call charges. Dispute within the first billing cycle if unexpected charges appear.

Local SIM vs eSIM in Bulgaria

Local prepaid SIMs at Sofia (SOF) in Bulgaria cost varies. Available from local carriers at airport counters. Wait time: 15-45 minutes. Passport registration required (ID required). An eSIM on A1 Bulgaria starts at $2.21 for 1GB with zero wait time and no passport scan. Install before departure. Activate after landing. The convenience gap is largest for short trips. For stays over 30 days, a local prepaid SIM may offer more data per dollar. For trips under 14 days, the e-SIM wins on time, convenience, and total cost.

The Airport Roaming Trap in Bulgaria

Your phone connects to A1 Bulgaria the moment the aircraft doors open at Sofia (SOF). The immigration queue takes 20-60 minutes. During that wait, background apps sync email, check weather, and refresh notifications. AT&T's International Day Pass triggers on the first data byte. Verizon TravelPass auto-enrolls simultaneously. You have not opened a single app yet. The charge: $10 for AT&T, $10 for Verizon. Over 7 days: $70. Prevention: enable airplane mode before landing. Keep it on through customs. Install your eSIM on airport WiFi if not already installed. Activate the e SIM as your data line. Then disable airplane mode. Your phone connects to A1 Bulgaria through the eSIM at $2.21 for 1GB. No $10 trigger.

How to Avoid Roaming Charges in Bulgaria

You can avoid roaming charges in Bulgaria by purchasing a travel eSIM that uses A1 Bulgaria's 5G network at a fixed price.

Your phone connects to A1 Bulgaria in Bulgaria regardless of whether you use carrier roaming or an eSIM. The difference is price: carriers charge $10/day for that access, while an eSIM charges $17.03 for 20GB.

Confirm your phone is eSIM-compatible and carrier-unlocked.
Buy an eSIM for Bulgaria: $17.03 for 20GB on A1 Bulgaria.
Scan the QR code in Settings > Cellular > Add eSIM.
Turn off Data Roaming for your primary carrier SIM.
Your phone now uses A1 Bulgaria for data with zero roaming charges.

An eSIM saves $53 compared to 7 days of carrier roaming in Bulgaria ($17.03 vs $70).

Carrier Roaming vs eSIM in Bulgaria

AT&T charges $10/day in Bulgaria — $70 for 7 days.

Verizon TravelPass costs $10/day — $70 for the same trip.

T-Mobile offers free low-speed roaming but charges $5/day for high-speed in Bulgaria.

Airalo provides 20GB on A1 Bulgaria for $17.03.

An eSIM saves up to $53 (76%) compared to carrier roaming plans.

Bill Shock Warning: Bulgaria

! Bill shock

US carriers charge $10/day in Bulgaria. Over 7 days, that bill reaches $70. An eSIM on A1 Bulgaria delivers 20GB for $17.03.

Compare eSIM providers for Bulgaria

eSIM alternatives

Best eSIM providers for Bulgaria

Ranked by price, coverage, and reliability in Bulgaria.

eSIM providers for Bulgaria, verified June 2026
Provider	Rating	Countries	From	Best for	Actions
Airalo#1 Pick	4.3 out of 5 stars4.3	200+	$4.50/GB	Best Overall	Get Airalo →Review
Nomad	4.1 out of 5 stars4.1	112+	$3.00/GB	Best Budget	Get Nomad →Review
Saily	4.2 out of 5 stars4.2	150+	$3.99/GB	Best Privacy	Get Saily →Review
Holafly	4.3 out of 5 stars4.3	178+	$2.99/day	Best Unlimited	Get Holafly →Review
HelloRoam	4.4 out of 5 stars4.4	186+	from $3.50/GB	Coverage + Value	Get HelloRoam →Review

Prices verified June 2026By AvoidRoaming Guides

We earn a commission when you purchase through links on this page. It does not change our rankings or the price you pay.

Provider pick

Why Airalo for Bulgaria

Trip cancellations happen. Airalo offers 14-day refund. AT&T's International Day Pass charges $10 the moment your phone touches A1 Bulgaria's network in Bulgaria — no refund for days you leave early, no credit for data you did not use. If your 7-day trip shortens to 3 days, AT&T still charges for every day your phone connected. Airalo's 20GB plan at $17.03 provides a fixed allocation without per-day billing. Unused data does not generate additional charges. Review cancellation terms before purchasing any eSIM plan for Bulgaria.

Networks

How networks work in Bulgaria

A1's towers serve millions of travelers in Bulgaria each year. AT&T charges each of them $10 per day for the same signal an eSIM delivers at $17.03. The network infrastructure does not change between a roaming connection and an eSIM connection — A1 transmits the same data through the same towers either way. 5 eSIM providers listed here connect through A1, Vivacom, and Telenor. Entry plans start at $2.21 for 1GB.

Mobile networks in Bulgaria — eSIM-compatible carriers, June 2026
Operator	Types
A1	4G
Vivacom	4G
Telenor	4G

Network coverage data verified June 2026.

Speed

Speed test results for Bulgaria

Bulgaria has limited 5G coverage through A1 Bulgaria. 5G trials in Sofia. Average download speeds reach 132 Mbps on A1 Bulgaria's network — the same infrastructure AT&T charges $10/day to access via roaming. Public WiFi availability is good.

Connectivity

Hotel WiFi and hotspots in Bulgaria

WiFi in Bulgaria is good, but it cannot prevent roaming charges on its own. Your phone still searches for A1 Bulgaria between hotspots. Walking from a WiFi-enabled cafe to the street triggers an AT&T connection — $10 charged instantly. Background app refreshes, push notifications, and location services all attempt cellular data the moment WiFi drops. The only reliable prevention is disabling data roaming on your home SIM. An eSIM on A1 Bulgaria then handles all data at local rates. Use WiFi as a backup for heavy downloads. Use the eSIM for everything else. Plans start at $2.21 for 1GB.

Privacy

Data privacy in Bulgaria

Bulgaria places no restrictions on VPN usage. Travelers can run any VPN provider on A1 Bulgaria's network without interference. This matters because WiFi availability is good — and every unsecured WiFi connection exposes banking credentials, email passwords, and payment details. An eSIM on A1 Bulgaria at $2.21 for 1GB provides a private cellular connection that is inherently more secure than public WiFi. Layer your VPN on top of the eSIM connection for maximum privacy. This combination eliminates both AT&T's $10/day roaming charge and the security risks of relying on hotel WiFi.

Pricing

eSIM plan prices for Bulgaria

What a travel eSIM costs in Bulgaria versus carrier roaming.

WiFi in Bulgaria is good — hotel lobbies, cafes, and transit hubs offer free connections. This means a smaller eSIM plan can stretch further. A 1GB plan at $2.21 covers navigation and messaging between WiFi spots. AT&T charges $10 per day for the same between-WiFi filler — $70 over 7 days. Use WiFi for heavy downloads and streaming. Reserve cellular data for Maps, ride-hailing, and quick searches.

Travel eSIM plan pricing for Bulgaria — verified June 2026
Data	eSIM Price	Per GB
1GB	$2.21	$2.21
3GB	$3.47	$1.16
5GB	$5.20	$1.04
10GB	$8.06	$0.81
20GB	$17.03	$0.85
Unlimited / day	$2.62/day	—

Prices sourced from provider websites and updated weekly.

Pricing verified June 2026

Multi-country

Visiting more than just Bulgaria?

AT&T charges $10/day per country. Crossing from Bulgaria into Åland Islands, Albania, and Andorra resets that daily charge for each border. A Europe trip through 3 countries costs $30/day in AT&T International Day Pass fees — $10 per country, per day. Regional eSIM bundles cover multiple Europe countries under a single plan. One purchase, one activation, zero border penalties. Individual country eSIM rates: Åland Islands: $35.10 for 20GB; Albania: $31.99 for 20GB; Andorra: $47 for 20GB. A regional plan often costs less than two days of multi-country AT&T roaming. Check regional bundle availability before booking country-specific plans for multi-stop Europe trips.

Local tips

What to know before you land in Bulgaria

What your carrier does not tell you about Bulgaria: Airport SIM cards cost roughly $5-10 for 5-10GB / 28 days. eSIM plans start lower and activate before you land. Bulgaria has fast mobile speeds (132 Mbps) despite limited 5G. Pack a Type C/F power adapter for Bulgaria.

Avoid these

What goes wrong with roaming in Bulgaria

Forgot to disable roaming

Data roaming left on triggers AT&T's $10/day charge the moment your phone connects to A1 Bulgaria in Bulgaria. One push notification activates the full daily charge. Disable it in Settings before boarding, not after landing.

iCloud backup over cellular

iCloud backs up overnight using any available data connection. A 500 MB backup at $2.05/MB costs over $1,000 on A1 Bulgaria in Bulgaria. Disable iCloud backup on cellular in Settings > Cellular before landing.

Day pass midnight reset misunderstood

AT&T's $10/day pass resets at midnight EET/EEST (UTC+2/+3) time — not local time in Bulgaria. Landing at 10pm local time can trigger two separate $10 charges before you sleep. An eSIM on A1 Bulgaria at $2.21 has no midnight reset.

Buying airport SIM without comparing

Airport SIM counters in Bulgaria charge $5-10 for 5-10GB / 28 days for physical SIMs. eSIM plans on A1 Bulgaria start at $2.21 for 1GB — lower cost, no queue, pre-installed before landing.

Not checking eSIM compatibility

Some older and carrier-locked devices cannot install eSIMs. Verify your phone supports eSIM before purchasing a plan for Bulgaria. Check Settings > Cellular > Add Cellular Plan on iPhone, or Settings > Connections > SIM Manager > Add eSIM on Android.

The bottom line

What the data says about roaming in Bulgaria

AT&T charges $10 per day in Bulgaria regardless of how much data you use. One megabyte or ten gigabytes — same $10 on A1 Bulgaria. An eSIM charges by the gigabyte: the 10GB plan costs $0.81/GB on A1 Bulgaria. Moderate users who consume 500 MB per day pay the full daily AT&T rate for data they barely use. An eSIM at $17.03 for 20GB matches your actual usage instead of charging a flat daily rate. Over 7 days, the per-GB approach saves $52.97 against AT&T's flat daily charge.

Before you fly

Phone setup checklist for Bulgaria

Disable data roaming: Settings > Cellular > Data Roaming OFF (do this before departure).

Install a Bulgaria eSIM while on home WiFi — plans from $2.21 for 1GB on A1 Bulgaria.

Save 112 as Bulgaria's emergency number in your contacts.

Pack a Type C/F power adapter for Bulgaria.

Local currency is BGN (лв).

Time zone: EET/EEST (UTC+2/+3). Adjust your phone clock on arrival.

After landing at Sofia (SOF): turn off airplane mode, activate your eSIM as the data line.

Keep your home SIM active for calls and texts via WiFi Calling.

Common questions

Roaming charge questions and answers for Bulgaria, answered

How do I disable roaming when using dual SIM for Bulgaria?

With dual SIM, you need to disable roaming on your home SIM specifically. On iPhone: Settings > Cellular > select your home SIM line > Data Roaming (off). Then set the eSIM as your primary data line under Cellular Data. On Android: Settings > SIM Manager > select home SIM > Data Roaming (off). The eSIM stays set to allow data. This prevents AT&T from charging $10/day while your Bulgaria eSIM handles data through A1 Bulgaria. Both SIM lines stay active: home SIM for calls and texts, eSIM for data at $2.21 instead of carrier roaming rates.

Can background apps trigger roaming charges in Bulgaria?

Yes, background apps are one of the most common sources of surprise roaming bills. With data roaming enabled and no day pass, AT&T charges $2.05/MB in Bulgaria. Background App Refresh on iPhone syncs mail, news, and social apps every 15-30 minutes automatically, including at 3am while you sleep. A single overnight background sync session can accumulate $50-200 in charges without you opening your phone. Disable Background App Refresh before travel: Settings > General > Background App Refresh > Off. Then disable data roaming. An eSIM replaces carrier data entirely. Background syncs bill against the eSIM's flat-rate data at $2.21, not your home carrier's per-MB rate.

What happens if I forget to turn off roaming in Bulgaria?

Your phone connects to A1 Bulgaria and AT&T charges $2.05/MB without a plan. A single 50 MB background sync costs over $100. With AT&T International Day Pass, you pay $10 the moment any data is used, even a push notification. Act immediately: turn on Airplane Mode, go to Settings > Cellular > Cellular Data Options > Data Roaming and switch it off, then disable Airplane Mode. Your home SIM resumes voice and SMS without data. Install an eSIM ($2.21 for 1GB on A1 Bulgaria) to restore data access. Call your carrier within 48 hours because AT&T and Verizon both waive first-time roaming overcharges if reported in the same billing cycle.

What is the cheapest way to avoid roaming charges in Bulgaria?

A prepaid eSIM is the most cost-effective way to avoid roaming charges in Bulgaria. The best per-GB rate is the 10GB plan at $8.06 total, which works out to $0.81/GB on A1 Bulgaria. Disable data roaming on your home SIM before departure and install the eSIM as your data line. Your home SIM keeps your number active for calls and texts. The eSIM handles all data at flat-rate pricing with no per-day activation fees and no per-MB overages.

What is the worst-case roaming bill for Bulgaria?

The worst-case scenario is pay-per-use roaming without any international plan. AT&T charges $2.05/MB and Verizon charges $2.05/MB for data in Bulgaria. A typical smartphone uses 500 MB-1.5 GB per day with normal browsing, maps, and messaging. That is $1,025-$3,075 per day in roaming charges. Over a 7-day trip, an unprotected phone can generate a bill of $7175-$21525. Real cases of $10,000+ bills appear regularly in consumer complaints to the FCC. Disable data roaming before departure and use an eSIM on A1 Bulgaria at $2.21 to prevent this entirely.

Should I use WiFi Calling or an eSIM for calls in Bulgaria?

Use both. WiFi Calling routes calls through your home carrier over WiFi, using your home minutes. It is free on most US carrier plans. The limitation: WiFi Calling only works when connected to WiFi, not mobile data. An eSIM on A1 Bulgaria at $2.21 gives you mobile data everywhere. Use WhatsApp or FaceTime over eSIM data for calls when WiFi is unavailable. Enable WiFi Calling before departure: iPhone Settings > Phone > WiFi Calling. When on hotel WiFi, calls route free through your home carrier. When on mobile data, use WhatsApp calls through the eSIM.

Should I suspend my home SIM for a long trip to Bulgaria?

Do not suspend for trips under 30 days. Suspending your home SIM disables calls, texts, and SMS verification codes. You lose the ability to receive two-factor authentication codes from banks and apps. For trips of 1-4 weeks, keep your home SIM active with data roaming off. Incoming call costs ($1.00-1.29/minute) are minimal if you let most calls go to voicemail. For trips over 30 days, consider T-Mobile's Military/Suspend plan ($10/month to hold your number) or AT&T Suspend ($10/month). Your eSIM on A1 Bulgaria at $2.21 handles all data regardless of home SIM status. Port your number to Google Voice ($20 one-time) for permanent VoIP access.

Does a Bulgaria eSIM work on multiple carriers?

Most travel eSIMs for Bulgaria connect to A1 Bulgaria and Vivacom as the primary network, with automatic fallback to secondary carriers if the primary signal is weak. Your phone selects the strongest available tower. This multi-carrier support means better coverage than a single-network physical SIM. When roaming with AT&T or Verizon, you are locked to their specific roaming partner. The eSIM's ability to connect to multiple Bulgaria carriers provides wider coverage at $2.21/GB versus $10/day for limited carrier roaming.

How do I configure data roaming settings for Bulgaria?

Complete setup before departure: (1) Disable Data Roaming on iPhone: Settings > Cellular > Data Roaming (off); Android: Settings > Connections > Mobile Networks > Data Roaming (off). (2) Turn on Airplane Mode before landing to block automatic carrier attachment to A1 Bulgaria. (3) Activate your pre-installed eSIM on local WiFi or after landing. (4) Set your home SIM to calls-only or data-off. Your home number stays active for calls and SMS; the eSIM handles all data without triggering your carrier's $10/day roaming rate.

Is my carrier's international add-on worth it for Bulgaria?

No. AT&T International Day Pass and Verizon TravelPass both cost $10/day, activated the moment any background app touches your data connection. A 7-day Bulgaria trip costs $70 in carrier add-on fees. A Bulgaria eSIM for the same 7 days costs $17.03 on 20GB, which is 76% cheaper with no activation risk from background data. Carrier add-ons are only worth considering for single-day trips where eSIM installation is not feasible.

Does EU free roaming apply in Bulgaria?

EU roam-like-at-home applies within EU member states. If Bulgaria is in the EU, your European carrier plan works without extra charges, but "fair use" limits apply. Most EU carriers cap roaming at the same data volume as your home plan, after which speed drops to 64 Kbps. US travelers get no EU roaming benefit. AT&T, Verizon, and T-Mobile charge standard international rates in Bulgaria. An eSIM starting at $2.21 avoids the fair-use throttle and the EU policy complexity.

Do I need to register a SIM card in Bulgaria?

ID required This applies to local physical SIM cards only. A travel eSIM installed before departure does not require local registration. It activates through your provider's app and connects to A1 Bulgaria without any in-person paperwork. Plans start at $2.21.

How do I document a roaming dispute for Bulgaria?

Gather evidence before calling your carrier. Screenshot Settings > Cellular > Current Period Roaming (iPhone) or Settings > Data Usage (Android) to show the data volume used. Download your carrier app and export the itemized bill showing each charge from A1 Bulgaria in Bulgaria. Save your travel itinerary and flight confirmation to prove your dates in Bulgaria. Note the exact dollar amount disputed and the date it appeared on your account. Write down the name and employee ID of every carrier agent you speak with. This documentation package gives you a complete record if the dispute escalates to the FCC or a credit card chargeback.

Can my phone connect to Bulgaria's carrier before I actually cross the border?

Yes. Carrier signals do not stop at the political border. Your phone detects A1 Bulgaria's towers up to 5-10 miles before you physically cross into Bulgaria. If A1 Bulgaria's signal is stronger than your home carrier's at that point, your phone may attach and roaming charges begin before you cross. This is common near busy border crossings where carriers position towers to capture cross-border traffic. Turn on Airplane Mode at least 10 miles before the border. Disable data roaming in Settings before re-enabling cellular. Install an eSIM at $2.21 to prevent automatic carrier attachment entirely.

If something goes wrong

eSIM troubleshooting for Bulgaria

QR code not scanning (carrier lock)

If the QR code scan fails during installation, your phone may be carrier-locked to your home network. Contact your home carrier to confirm your device is unlocked before traveling to Bulgaria. Carrier-locked phones cannot install eSIM profiles from any other provider.

Plan activated before landing

If you activated your Bulgaria eSIM before landing, it may start consuming data before you arrive. Keep the eSIM profile toggled off in Settings until you land at Sofia (SOF). Activate it only after clearing customs to avoid using data before your trip starts.

Dual-SIM confusion (set data line correctly)

After landing in Bulgaria, verify that Settings shows your eSIM line — not your home SIM — as the active data line. Go to Settings > Cellular (iPhone) or SIM Manager (Android). If data routes through your home SIM, you will be charged AT&T roaming rates on A1 Bulgaria.

No signal after landing (toggle airplane mode)

If the eSIM shows no signal after landing at Sofia (SOF), toggle airplane mode on and off. This forces your phone to re-register with A1 Bulgaria's nearest tower. Wait 30 seconds for the registration to complete before checking connectivity.

Data running out (top up vs second plan)

If your Bulgaria eSIM data runs low, top up through your provider's app rather than activating your home SIM's roaming. Roaming top-up costs $10/day on A1 Bulgaria — a second eSIM top-up often costs less than half that for comparable data.

Quick reference