Reunion Roaming Tips: Save Money on Data Abroad (2026)
Disable data roaming before landing in Reunion. Use an eSIM on Orange RE for $18.43/10GB instead of $10/day carrier roaming. Saves $52 over 7 days.
Before You Land
Pick the Right Data Plan
Match your plan to your trip length. A 1GB eSIM covers light use for 7 days at $3.67. For heavy use, unlimited daily plans start at $3.10/day.
| Trip Length | Recommended | Cost |
|---|---|---|
| 3-5 days | 1GB | $3.67 |
| 3-5 days | 3GB | $5.48 |
| 7-10 days | 5GB | $11.32 |
| 7-10 days | 10GB | $18.43 |
Compare all eSIM providers for Reunion→
Phone Preparation Checklist
- Install your eSIM over home WiFi
- Download offline maps for Reunion
- Enable WiFi Calling on your phone
- Turn off automatic app updates over cellular
- Charge a portable battery pack
- Save Reunion's emergency number: 15/17/18/112
Download These Apps First
- Offline maps: Google Maps or Maps.me for Reunion
- Translation: Google Translate language pack
- Currency: converter app for EUR
Know Your Carrier's Rates
AT&T: $10/day (auto-triggered). Verizon: $10/day (2GB cap). T-Mobile: free at 256 Kbps (too slow for maps). Without any plan: $2.05/MB. Know these numbers so you can calculate what you are saving.
At the Airport
When to Activate Your eSIM
After clearing customs at Reunion's airport, before leaving the terminal. Do not enable your eSIM during layovers. Each country your phone connects to triggers a separate carrier charge. Your eSIM plan timer starts at first network connection.
First Connection Test
- Open your browser and load any page to confirm data works
- Check the status bar for Orange RE carrier name
- Verify your home SIM still receives calls
- Run a speed test at fast.com
iPhone Roaming Settings for Reunion
iPhone 14 and newer models sold in the US are eSIM-only. Both SIM slots are digital. Open Settings > Cellular to see your installed lines. Tap your home carrier line (AT&T, Verizon, or T-Mobile). Turn off Data Roaming under Cellular Data Options. This one toggle prevents the $10/day charge on Orange RE in Reunion. Next, install a Reunion travel e SIM: Settings > Cellular > Add eSIM. Scan the QR code from your eSIM provider or use the provider's app. After installation, go to Settings > Cellular > Cellular Data and select the travel eSIM as your data line. Your home carrier stays active for calls and texts. The eSIM handles all data on Orange RE at $3.67 for 1GB. Over 7 days, this saves $66.33 versus AT&T Day Pass.
Samsung Roaming Settings for Reunion
Samsung Secure Folder apps use a separate data profile. If you have work apps in Secure Folder on your Galaxy, those apps may sync independently of your main profile's Data Roaming setting. Check Secure Folder > Settings > App Data to verify roaming behavior. Disable cellular data for Secure Folder apps before traveling to Reunion. Your main eSIM on Orange RE handles personal apps at $3.67 for 1GB. Work apps in Secure Folder should sync on hotel WiFi only. AT&T charges $10/day for any data on Orange RE through your home SIM. Secure Folder data counts toward that charge if roaming is not disabled on both profiles.
Pixel Roaming Settings for Reunion
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 Orange RE in Reunion. 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 Orange RE at $3.67 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 for Reunion
Dual-SIM configuration for Reunion: your home SIM handles calls and texts, your travel eSIM handles data. Step 1: disable Data Roaming on your home SIM. iPhone: Settings > Cellular > tap home carrier line > Cellular Data Options > Data Roaming OFF. Samsung: Settings > Connections > SIM Manager > home SIM > Data Roaming OFF. Pixel: Settings > Network & Internet > SIMs > home SIM > Roaming OFF. Step 2: install a Reunion travel e SIM on Orange RE. Step 3: set the eSIM as your Cellular Data / Mobile Data line. iPhone: Settings > Cellular > Cellular Data > select eSIM. Samsung: SIM Manager > Preferred SIM > Data > select eSIM. Pixel: Settings > Network & Internet > SIMs > tap eSIM > Use for data. Step 4: enable Data Roaming ON for the eSIM line. This allows the eSIM to connect to Orange RE partner networks. Your home SIM with roaming OFF prevents the $10/day charge. Your eSIM with roaming ON connects to Orange RE at $3.67 for 1GB. The critical detail: roaming must be OFF on the correct line and ON on the other.
WiFi Calling Setup for Reunion
WiFi Calling and emergency calls in Reunion: emergency calls (15/17/18/112) always route through the strongest available cellular network, regardless of your WiFi Calling or eSIM settings. This means emergency calls work even if your home SIM has data roaming OFF and your eSIM has no remaining data. Enable WiFi Calling for regular calls: iPhone Settings > Phone > WiFi Calling ON. Keep your eSIM active on Orange RE for data at $3.67 for 1GB. Use WiFi Calling for voice at domestic rates. For emergencies, dial 15/17/18/112 directly. The call routes through Orange RE or any available network without a data plan, eSIM, or WiFi connection. Save 15/17/18/112 in your contacts before departure.
Background App Settings for Reunion
Background App Refresh (iPhone)
Settings > General > Background App Refresh
Disable globally or per-app. Background refresh on Orange RE in Reunion consumes 50-200 MB/day without you opening any app. At $2.05/MB without a roaming plan, that is $102-410/day in silent charges. With an eSIM, this data counts against your plan. Disable for social media, news, and shopping apps. Keep enabled for Maps and messaging.
Mail Fetch vs Push (iPhone)
Settings > Mail > Accounts > Fetch New Data
Switch from Push to Fetch (every 30 minutes or Manual). Push email checks Orange RE's network every 15-60 seconds in Reunion. At RET (UTC+4) timezone, overnight pushes sync while US colleagues send daytime emails. Fetch reduces email data by 60-80% compared to Push. Each push check: 0.5-2 MB.
iCloud Photos cellular upload (iPhone)
Settings > Photos > Cellular Data OFF
iCloud uploads every photo to the cloud over cellular by default. After a day of sightseeing in Reunion, 50-200 photos queue for upload overnight. Each high-res photo: 3-8 MB. Total overnight upload on Orange RE: 150-1,600 MB. At $2.05/MB: $307-3,280 without a plan. With an eSIM, this drains your data balance. Upload photos manually on hotel WiFi instead.
Data Saver (One UI) (Samsung)
Settings > Connections > Data Usage > Data Saver ON
Samsung Data Saver restricts background data for all apps except whitelisted ones. Whitelist Maps, your messaging app, and your eSIM provider app. Block background data for social media, streaming, and news. This reduces background consumption on Orange RE in Reunion by 30-50%. Your eSIM data lasts longer without manual intervention.
Auto-sync toggle (Samsung)
Settings > Accounts and Backup > Manage Accounts > Auto Sync Data OFF
Auto-sync pushes email, contacts, calendar, and app data over Orange RE in Reunion. Disabling auto-sync stops all account synchronization on cellular. Sync manually on hotel WiFi. Re-enable auto-sync when you return home. This single toggle prevents the largest category of background data usage on Samsung devices.
Adaptive Battery and data (Pixel)
Settings > Battery > Adaptive Battery ON
Pixel's Adaptive Battery restricts background activity for infrequently used apps. In Reunion, this reduces unnecessary data consumption on Orange RE without manual app-by-app management. Keep Adaptive Battery ON. It learns your usage pattern and limits background data for apps you rarely open while traveling.
Set data warning and limit (Pixel)
Settings > Network & Internet > SIMs > eSIM > Data Warning & Limit
Set a data warning at 80% of your eSIM plan and a hard limit at 95%. Pixel shows a notification when you approach the warning threshold. The hard limit stops cellular data before you exceed your plan in Reunion. This prevents overage charges on prepaid eSIM plans and unexpected top-up costs on Orange RE.
Automatic App Downloads (iPhone)
Settings > App Store > App Downloads: toggle OFF for cellular
A single app update runs 50-500 MB. At $2.05/MB on Orange RE in Reunion: $102-1,025 per update without a plan. With an eSIM, one update can consume 10-50% of a small data plan. Disable automatic downloads. Update apps manually on hotel WiFi only. Check for updates before departure so critical apps are current.
Airplane Mode Sequence for Reunion
Landing sequence at the airport: keep Airplane Mode ON when the plane touches down. Step 1 (while taxiing): open Settings, confirm Data Roaming is OFF on your home SIM. Step 2 (at the gate): turn on WiFi while still in Airplane Mode. Connect to airport WiFi if you need to verify your eSIM profile. Step 3 (after clearing customs): disable Airplane Mode. Your phone finds Orange RE. Data routes through your eSIM at $3.67 for 1GB. AT&T never connects. The entire sequence takes 60 seconds. The alternative: forget these steps, connect to Orange RE through AT&T, and pay $10 before you reach baggage claim.
Data Usage Monitoring in Reunion
Pixel phones on Android 15: Settings > Network & Internet > SIMs > tap your e SIM > App Data Usage. This shows per-app consumption on Orange RE in Reunion. Set a data warning: Settings > Network & Internet > SIMs > eSIM > Data Warning & Limit. Warning at 8 GB, limit at 9.5 GB. Your 10GB plan gives a daily budget of 1.4 GB over 7 days. Pixel shows the most data-hungry apps first. Restrict background data for streaming and social media apps that consume more than 100 MB/day. Keep Maps and messaging unrestricted.
Reunion-Specific Device Settings
Switch email from Push to Fetch in Reunion. The RET (UTC+4) timezone means US business hours overlap with your nighttime. Push email checks Orange RE's network every 15-60 seconds while you sleep. Each check costs 0.5-2 MB at $2.05/MB without a plan. iPhone: Settings > Mail > Accounts > Fetch New Data > switch to Every 30 Minutes or Manually. Android: open your email app Settings > Sync frequency > Every 30 Minutes or Manual.
Turn Off Roaming: Reunion Device Guide
iPhone
The quickest way to disable roaming on iPhone before visiting Reunion: open Settings > Cellular, tap Cellular Data Options, toggle Data Roaming off.
If your iPhone has iOS 18+, you can set Data Roaming per SIM. Go to Settings > Cellular > tap your carrier's plan > Cellular Data Options. Turn off Data Roaming for your US plan only. Your Reunion eSIM operates independently.
Samsung
Samsung Galaxy phones disable roaming at Settings > Connections > Mobile Networks > Data Roaming. This stops $10/day AT&T charges in Reunion.
Samsung Galaxy S24 and newer models support dual eSIM. You can add a Reunion eSIM alongside your carrier eSIM. Disable Data Roaming on the carrier plan and use Orange RE for data at $18.43/10GB.
Pixel
To turn off roaming on Google Pixel before visiting Reunion, go to Settings > Network & Internet > SIMs > select your carrier > toggle Roaming off.
With Roaming disabled, your Pixel phone will not bill through your carrier in Reunion. Add a travel eSIM: Settings > Network & Internet > SIMs > Add SIM. Scan the QR code for 10GB on Orange RE at $18.43.
Getting Data in Reunion
Best Way to Get Data
The best way to get data in Reunion is a travel eSIM on Orange RE — 10GB for $18.43, activated before you land.
Local SIMs are available at the airport but require queuing. An eSIM skips the counter entirely. You buy it online, scan a QR code, and connect to Orange RE's 5G network. The 10GB plan costs $18.43 and lasts your entire 7-day trip.
- Check that your phone supports eSIM (iPhone XS+, Samsung Galaxy S21+, Pixel 3+).
- Buy a Reunion eSIM: 10GB on Orange RE for $18.43.
- Scan the QR code: Settings > Cellular > Add eSIM (iPhone) or SIM Manager (Samsung).
- Disable carrier data roaming to prevent simultaneous charges.
- Land in Reunion with data already active on Orange RE.
An eSIM costs $18.43 vs carrier roaming at $70 or airport SIM at $15-25+.
Do You Need an eSIM?
An eSIM is the best option for data in Reunion if you want full 5G speed without daily roaming charges. Alternatives: airport SIM (queues), pocket WiFi (bulk), or carrier roaming ($10/day).
An eSIM is particularly valuable in Reunion if you need real-time navigation, language translation, or video calls. WiFi alone cannot support these use cases reliably. The 10GB plan costs $18.43 and lasts 7+ days.
With an eSIM, a 7-day trip to Reunion costs $18.43 for data. Carrier roaming costs $70.
Top Roaming Tip for Reunion
Disable data roaming before landing in Reunion. Use an eSIM on Orange RE for $18.43/10GB instead of $10/day carrier roaming. Saves $52 over 7 days.
During Your Stay
Stretch Your Data
- Use WiFi for downloads and streaming
- Keep video quality at 480p on cellular
- Disable auto-play on social media feeds
- Use offline maps for navigation
- Compress photos before uploading
Tethering and Hotspot
Share your eSIM data with travel companions via Personal Hotspot. Most eSIM providers allow tethering. Holafly supports it on all plans. Airalo supports it on most plans. Battery drains faster with hotspot enabled.
Top Up If You Run Out
Buy more data through the provider app. Or purchase a second eSIM. Switch to unlimited daily at $3.10/day for worry-free data. eSIM installation refresher →
Roaming mistakes that add up in Reunion
The Push Notification Trap
One push notification triggers AT&T's $10 daily charge. Weather widgets, email sync, WhatsApp pings. The charge resets at midnight Eastern, not Reunion local time.
The WiFi Drop Trap
Walking out of hotel WiFi range triggers a carrier connection on Orange RE. One webpage load on your home SIM costs $10. Keep home SIM data roaming OFF.
The Background Sync Trap
iCloud backup overnight at per-MB rates: $1,025-2,099. A single app update (200 MB): $410. Photo sync and email attachment downloads add up fast. Disable all background sync on your home SIM before departure.
The Departure Day Trap
Carrier charges apply on departure day. Your phone connects to Orange RE at Reunion's airport during check-in, triggering an extra $10 charge. Disable roaming on your home SIM before leaving your hotel.
The Transit Layover Trap
Each country layover triggers a separate $10/day charge. A flight with one layover means two countries, two charges. Keep airplane mode on during all layovers.
More Mistakes to Avoid
Forgot to disable roaming
Data roaming left on triggers AT&T's $10/day charge the moment your phone connects to Orange RE in Reunion. One push notification activates the full daily charge. Disable it in Settings before boarding, not after landing.
WiFi Assist left on
iOS WiFi Assist automatically switches to cellular when hotel WiFi weakens. In Reunion, this routes data through your home SIM on Orange RE, triggering AT&T's $10/day charge mid-session. Disable WiFi Assist under Settings > Cellular before departure.
Day pass midnight reset misunderstood
AT&T's $10/day pass resets at midnight RET (UTC+4) time — not local time in Reunion. Landing at 10pm local time can trigger two separate $10 charges before you sleep. An eSIM on Orange RE at $3.67 has no midnight reset.
Money-Saving Tricks
eSIM Stacking
Visiting multiple countries? Buy a regional eSIM instead of per-country plans. Airalo offers Asialink, Eurolink, and other regional options. Delete expired profiles to free eSIM slots on your phone.
WiFi Calling for Free Voice
Use WiFi Calling on your home number for free inbound and outbound calls. iPhone: Settings > Phone > WiFi Calling. Android: Settings > Network > WiFi Calling. Works alongside your eSIM data. No per-minute carrier roaming charges.
Offline Everything
Download before departure: maps, translation packs, entertainment (Netflix and Spotify offline mode), boarding passes, and hotel confirmations. This reduces daily data usage from 1.5 GB to under 500 MB.
Family and Group Savings
4 phones × $10/day × 7 days = $280 carrier cost. 4 eSIMs at $3.67 each = $14.68. Savings: $265.32. Or share one eSIM via hotspot for even more savings.
Roaming charges in Reunion roaming tips
How do I disable roaming when using dual SIM for Reunion?
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 Reunion eSIM handles data through Orange RE. Both SIM lines stay active: home SIM for calls and texts, eSIM for data at $3.67 instead of carrier roaming rates.
Can background apps trigger roaming charges in Reunion?
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 Reunion. 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 $3.67, not your home carrier's per-MB rate.
How do I check how much roaming data I used in Reunion?
On iPhone: Settings > Cellular > scroll down to "Current Period Roaming" to see total roaming data consumed. On Android: Settings > Connections > Data Usage > Mobile Data Usage > select your SIM, then filter by roaming. Check this immediately after landing in Reunion to catch charges early. AT&T also sends usage alerts at 50%, 75%, and 100% of Day Pass data limits. Log into the myAT&T or My Verizon app for itemized charges from Orange RE. If roaming data appeared, enable Airplane Mode, disable data roaming, and call your carrier within 48 hours. Prevent future charges with an eSIM at $3.67 for 1GB.
Does an eSIM get the same coverage as roaming in Reunion?
Yes. An eSIM connects to Orange RE, the same network infrastructure AT&T and Verizon use for roaming in Reunion. You get identical towers, identical coverage area, and the same 5G speeds. The only difference is billing: your carrier charges $10/day or $2.05/MB for roaming access to these towers, while the eSIM charges $1.83/GB for the same connection. There is no coverage penalty for using an eSIM. In many cases, eSIM data speeds are faster because carrier roaming agreements sometimes throttle international users to lower priority.
How much does roaming cost for a family traveling to Reunion?
AT&T and Verizon charge Day Pass fees per line, not per account. A family of four on AT&T Day Pass pays $40/day in Reunion, totaling $280 for a 7-day trip. Children's phones are particularly risky because apps and games download updates in the background. One child's iPad streaming a YouTube video at $2.05/MB racks up $400+ in under an hour. Four eSIMs on Orange RE cost roughly $21.92 total for 3 GB each. Share one eSIM's hotspot to cover all devices and cut costs further.
Should I use WiFi Calling or an eSIM for calls in Reunion?
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 Orange RE at $3.67 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.
What happens to my home number while using an eSIM in Reunion?
Your home number stays fully active. With dual-SIM setup, your home SIM keeps your phone number for calls and texts while the Reunion eSIM handles data on Orange RE. You receive calls on your home number. SMS messages arrive normally. Data routes through the eSIM at $3.67 instead of your carrier's $10/day roaming. On iPhone, set Cellular Data to the eSIM line and Default Voice to your home SIM. Both lines work simultaneously. Your home number is not affected by the eSIM installation and remains active throughout your entire trip.
Does a Reunion eSIM work on multiple carriers?
Most travel eSIMs for Reunion connect to Orange RE and SFR 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 Reunion carriers provides wider coverage at $3.67/GB versus $10/day for limited carrier roaming.
How do I configure data roaming settings for Reunion?
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 Orange RE. (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.
Are carrier add-ons OK for a 1-day layover in Reunion?
For a single day in Reunion, AT&T Day Pass at $10 is comparable to a basic eSIM. However, the Day Pass auto-activates from a push notification and you cannot control the start time. If your flight lands at 11pm and a notification triggers the pass, you pay $10 for one hour of the first day, then another $10 the next morning. An eSIM at $3.67 for 1 GB covers the entire layover with no auto-activation risk. For layovers over 6 hours, the eSIM wins. For 2-hour layovers where you stay on airport WiFi, neither is necessary.
Can my phone connect to Reunion's carrier before I actually cross the border?
Yes. Carrier signals do not stop at the political border. Your phone detects Orange RE's towers up to 5-10 miles before you physically cross into Reunion. If Orange RE'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 $3.67 to prevent automatic carrier attachment entirely.
How do I fully disable cellular data on a cruise near Reunion?
The safest approach: enable Airplane Mode before the ship leaves any port near Reunion. Then manually re-enable WiFi only (Airplane Mode stays on, just WiFi toggled back). This disconnects from all cellular networks including maritime satellite, while keeping ship internet access. On iPhone, swipe to Control Center, tap Airplane Mode (orange icon), then tap the WiFi icon to re-enable it. On Android, the same approach works through Quick Settings. Verify your cellular status: no carrier name or bars should appear in the status bar. When your port stop arrives, disable Airplane Mode and your eSIM at $3.67 connects to Orange RE on the Reunion shore network.
How much data can I save by using offline maps in Reunion?
Offline maps eliminate the largest single source of navigation data use. Google Maps online navigation in Reunion consumes 5-10 MB/hour of active use. Downloaded offline maps reduce that to near zero for turn-by-turn directions. Download your Reunion region before departure over home WiFi: Google Maps app > search for Reunion > three dots > Download Offline Map. Apple Maps also supports offline downloads in iOS 17+. A typical Reunion offline map is 100-500 MB and covers the entire country for navigation. This saves 100-500 MB over a 7-day trip on Orange RE, reducing how much of your eSIM plan at $3.67 you consume on maps alone.
Will I get charged if my phone is in my pocket in Reunion?
Yes. Your phone does not need to be in your hand to trigger roaming charges in Reunion. Background processes sync email, update weather, refresh social feeds, and ping location services automatically through Orange RE. AT&T International Day Pass activates the moment any data crosses the connection, even a single push notification received while your phone sits in your pocket. That costs $10 for the calendar day. Disable data roaming before landing: Settings > Cellular > Data Roaming (off). Without this step, your phone generates charges from Orange RE without you touching it. An eSIM at $3.67 handles all background syncs at flat-rate pricing.
Save money on data in Reunion.
A 1GB eSIM costs $3.67 on Orange RE. AT&T charges $70 for the same 7 days.
Former consumer pricing analyst at J.D. Power covering wireless carrier satisfaction surveys
How we verify rates →We earn a commission when you purchase through links on this page. It does not change our rankings or the price you pay.