How to avoid roaming charges in Comoros
Millions of travelers visit Comoros each year. Most arrive during peak travel months. AT&T charges every one of them $10 per day the moment their phone connects to Comoros Telecom. A 7-day trip costs $70 in roaming fees before a single map search. A Comoros eSIM on Comoros Telecom covers 5GB for $9.99.
Turn off data roaming in Settings before you board. Install your eSIM while still on home WiFi. After landing, activate the eSIM as your data line. Your home SIM stays active for calls and texts, but data flows through the eSIM at local rates. Entry plans start at $4.50 for 1GB.
Carrier roaming costs revealed for Comoros
Without any plan, AT&T charges $2.05 per MB in Comoros (source: AT&T International Roaming rates, att.com/international, verified June 2026). One hour of normal phone use — Maps, a few emails, background app refresh — consumes roughly 100 MB. That is $205 in a single hour. Over 7 days of moderate use, the bill can reach $22. Even with the $10/day International Day Pass, the cost is $70. A 5GB eSIM on Comoros Telecom covers the same 7 days for $9.99 — saving $60.01.
What everyday activities cost on roaming in Comoros
| Activity | Data Used | Roaming Cost | eSIM Cost |
|---|---|---|---|
| Send WhatsApp photo | 3 MB | $6.15 | $0.00 |
| 10 min Google Maps | 5 MB | $10.25 | $0.00 |
| 10 min Instagram scrolling | 50 MB | $102.50 | $0.04 |
| Send email with photo | 3 MB | $6.15 | $0.00 |
| 30 min Spotify | 45 MB | $92.25 | $0.04 |
| Check Google Translate (10 queries) | 2 MB | $4.10 | $0.00 |
What roaming costs per trip day in Comoros
Four phones on AT&T in Comoros: $40/day. Over 7 days: $280. Each device bills $10/day independently on Comoros Telecom — a child's game, a partner's map search, a grandparent's text all trigger separate daily charges. Four eSIMs on Comoros Telecom cost $39.96 total for 5GB each. Family savings: $240.04. Per device, per day: AT&T = $10. eSIM = $1.43. The math scales as badly for families as it does for individuals.
Per-day roaming fees for Comoros
AT&T International Day Pass charges $10/day in Comoros. Verizon TravelPass charges $10/day. Both connect through Comoros Telecom and offer the same coverage map. T-Mobile includes international data on most plans, but throttles speeds to 256 Kbps — slow enough that Google Maps tiles fail to load and ride-hailing apps time out. All three carriers use Comoros Telecom's towers in Comoros. None of them operate their own infrastructure here. The $10/day fee pays for the billing agreement between your home carrier and Comoros Telecom, not for better signal or faster speeds. A Comoros eSIM on Comoros Telecom costs $9.99 for 5GB — the same network, the same towers, at $1.99/GB instead of $10/day.
How AT&T triggers charges in Comoros
Dual-SIM phones in Comoros carry a specific risk: both SIM lines can receive data connections simultaneously. If your home SIM has data roaming enabled and your eSIM is also active, your phone may route some traffic through the home SIM's roaming connection and some through the eSIM. AT&T charges $10/day for any data through the home SIM, even a single background sync. Set your eSIM as the primary data line in Settings and disable data roaming on your home SIM before leaving your hotel. Verify in Settings that "Cellular Data" shows your eSIM line, not your home carrier. An eSIM on Comoros Telecom at $9.99 for 5GB handles all data cleanly when configured as the sole data source.
Automatic syncing charges in Comoros
Background App Refresh on your iPhone syncs email, social media, weather, and news apps every 15-30 minutes in Comoros. Each cycle pulls 2-10 MB from Comoros Telecom's network. Over 24 hours, that accumulates to 50-200 MB of data you never requested. At $2.05/MB on AT&T roaming, one day of idle background syncing costs $100-410 before you open a single app. Disable it before departure: Settings > General > Background App Refresh > Off. On Android: Settings > Connections > Data Usage > Restrict Background Data. This single toggle blocks dozens of apps from silently consuming data. An eSIM at $4.50 for 1GB on Comoros Telecom makes background syncs cost pennies instead of hundreds.
Airport connectivity options for Comoros
You land in Comoros at 11:45pm and the airport SIM counter is closed. The next shift starts at 7am. Your options: pay AT&T $10/day on Comoros Telecom until morning, or use a pre-installed eSIM that activates the moment airplane mode turns off. Airport SIM counters at the airport operate on local business hours, not your flight schedule. Red-eye arrivals, early-morning landings, and delayed flights all arrive outside counter hours. An eSIM on Comoros Telecom installs before you leave home — 1GB for $4.50, active on landing regardless of the hour. No counter, no waiting for business hours, no $10 overnight charge.
Pre-departure eSIM setup for Comoros
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 Comoros roaming charges can still hit your home carrier bill.
Buy a travel eSIM
Get a plan from Holafly at $0.90/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 Comoros, go to Settings › Cellular and set your travel eSIM as the primary data line. It connects to Comoros Telecom 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.
Phone prep guide for Comoros
Enable WiFi Calling before traveling to Comoros to keep your home number active without cellular roaming. On iPhone: Settings > Cellular > Wi-Fi Calling > On. On Android: Settings > Connections > Wi-Fi Calling > On. WiFi Calling routes voice calls and texts through any WiFi connection using your home carrier number, bypassing Comoros Telecom's cellular network entirely. This means your home SIM stays useful for calls — to family, for 2FA codes, for US-based contacts — without triggering AT&T's $10/day data charge. Your eSIM on Comoros Telecom handles all cellular data at $9.99 for 5GB. WiFi Calling plus eSIM data creates a two-layer setup that eliminates roaming charges while maintaining full functionality of both phone numbers.
