Comoros · roaming cost calculator
eSIM or Carrier Roaming for Comoros: Dollar-for-Dollar Comparison
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Which eSIM providers cover Comoros networks
Holafly prices by the day, not the gigabyte. In Comoros on Telma Comoros's 3G network: if you use under 2GB per trip, a per-GB plan from Airalo or Nomad will cost less.
Get eSIMAiralo's app rates 4.8 on iOS and 4.6 on Android. In Comoros it routes through Telma Comoros's 3G network at $0.90/GB — real-time data usage tracking shows how much you have left.
Get eSIMTelma Comoros provides 3G service for Saily in Comoros. At $0.90/GB, the plan includes VPN protection that costs $13/month as a standalone NordVPN subscription.
Get eSIMNomad's Comoros plan uses Telma Comoros infrastructure at $0.90/GB. The checkout flow takes under two minutes — no account required for first-time buyers.
Get eSIMCompare providers: Airalo vs Holafly · Airalo vs Saily · Airalo vs Nomad · Holafly vs Saily · Holafly vs Nomad · Saily vs Nomad
The full picture
AT&T, Verizon, and T-Mobile rates for Comoros
Every major carrier's published Comoros rate, side by side, with the eSIM winner highlighted.
| Carrier | Plan type | Daily | 7-day | Speed | Data limit |
|---|---|---|---|---|---|
| Vodafone | Roaming Passport | $6.00source | $42.00 | LTE | Fair-use |
| EE | Roam Abroad | $6.00source | $42.00 | LTE | Fair-use |
| AT&T | International Day Pass | $10.00source | $70.00 | LTE | Plan data |
| Verizon | TravelPass | $10.00source | $70.00 | LTE | Plan data |
| eSIM · Holafly | 1 GB · 7 days | — | $0.90 | LTE / 5G | 1 GB |
Compare all carrier roaming plans to see how AT&T, Verizon, T-Mobile, Vodafone, and EE stack up against eSIM providers.
Pay-per-use cost audit
Comoros data bill scenarios: AT&T without a day pass
Here is how the first morning in Comoros plays out on AT&T pay-per-use (no plan active). You wake up, open Google Maps to find coffee nearby (~50 MB). You check email and a few attachments load (~5 MB). You scroll Instagram for 15 minutes while you wait (~20 MB). That totals 75 MB. At $2.05/MB, your first morning costs $154 before 9 AM. A 5-minute FaceTime call to confirm plans adds $154. By noon, after another hour of navigation, the bill reaches $410. These are AT&T's published pay-per-use charges. Source: AT&T rate card, June 2026.
Personalize your savings
How much will you save with an eSIM in Comoros?
Adjust your trip length, carrier, and data habits to see your exact savings.
Network coverage
Comoros roaming network partnerships explained
Verizon TravelPass connects to Comoros Telecom in Comoros at $10/day. A travel eSIM connects to the same Comoros Telecom network at $0.90/GB. Same signal, same speed, same carrier towers. Different price tag. Airalo deliver the same 3G signal for less. 3G download and upload speeds are available on Comoros Telecom in Comoros. A carrier roaming pass delivers those speeds. A travel eSIM delivers the same speeds. Paying $10/day does not increase your download speed over the $0.90/GB eSIM rate.
Pricing breakdown
Per-day data costs in Comoros: roaming and eSIM
Here is the 14-day cost breakdown for Comoros. AT&T International Day Pass: $140. Verizon TravelPass: $140. T-Mobile high-speed add-on: $210 (256 Kbps free tier is too slow for maps or video calls). eSIM 10GB plan on Telma Comoros: $9. That is $131 less than AT&T, a 94% reduction for the same 3G connectivity.
The eSIM daily rate works out to $0.64 when spread across 14 days. AT&T charges $10/day, which is 15.6x that figure. T-Mobile's high-speed pass is $15/day. All three connect to the same Telma Comoros towers in Comoros.
Per-GB rates for Comoros eSIM plans: . Larger plans cost less per gigabyte, so buying up one tier saves money if you are close to the limit.
Trip cost breakdown
What your carrier charges for each Comoros trip type
AT&T bills $10/day for roaming in Comoros — that is $0.42/hour around the clock, whether your phone is in your pocket or active. A 2GB eSIM on Telma Comoros costs $1.80 for 3 days — $0.03/hour at continuous use. Difference for a 3-day trip: $28.20.
Over 14 days, AT&T's per-hour rate stays at $0.42. A 15GB eSIM on Telma Comoros for 15GB averages $0.04/hour over the same 14 days. AT&T total: $140. eSIM total: $13.50. Difference: $126.50.
A 30-day stay at $0.42/hour on AT&T reaches $300. A 50GB eSIM on Telma Comoros covering 50GB for video calls and streaming costs $45 — $0.06/hour. Total difference over 30 days: $255 (85%). Rates checked June 2026.
Airport options
Comoros arrival data: airport SIM vs eSIM
Airport kiosks in Comoros quote SIM card prices before taxes and activation fees. After the counter adds those costs, your final bill is higher than the posted rate. A 5GB eSIM at $4.50 is an all-in price — what you see online is what you pay. No register surprise after a long international flight.
Data planning
Comoros data allowance guide: 7-day stays
One hour of video streaming consumes about 1 GB. Two hours/day of streaming in Comoros uses 2 GB daily, more than 1.5 GB average usage. For a 7-day trip with occasional streaming, budget at least 11GB. WiFi in Comoros is unreliable, so lean toward a larger plan.
5GB of data covers uploading roughly 512 full-resolution photos to cloud storage. That is 73 photos per day for 7 days, plus maps and messaging. The plan costs $4.50. AT&T's equivalent roaming: $70.
Connectivity
Public WiFi coverage in Comoros
WiFi mostly limited to upscale hotels in Moroni Airport WiFi in Comoros typically limits free sessions to 30-60 minutes after landing. Once that runs out, you are relying on hotel WiFi or paying airport day-pass rates. An eSIM on Telma Comoros activates before you board and gives you 3G speeds from the moment you land — no session timers.
Plan your data
Comoros connectivity: planning your GB budget
Buying a local SIM in Comoros means finding a shop, showing your passport, and waiting. AT&T roaming avoids that hassle but charges $100 for 10 days. A 5GB eSIM costs $4.50 and installs before you leave home.
Comoros has two mobile operators: Comoros Telecom and Telma Comoros. When AT&T or Verizon customers roam here, their calls and data pass through these exact networks. A travel eSIM reaches Comoros Telecom or Telma Comoros directly at $0.90/GB — the service is identical; the roaming markup is not.
WiFi in Comoros is limited and unreliable in most areas. An eSIM fills the gaps at $0.90/GB instead of AT&T's $10/day roaming charge. Local prices in Comoros are in Comorian Franc (KMF) (CF), but eSIM plans are priced in USD, eliminating exchange rate uncertainty on your data costs.
Quick reference
Comoros Travel Essentials
17/18
17, 18 are the emergency numbers in Comoros. Different numbers may route to different services — save all of them before your trip. Emergency calls work from any mobile device, including travel eSIMs.
Type C/E
Comoros uses Type C outlets (European two round-prong). US plugs require a Type C adapter. Check that your phone and laptop chargers show 100-240V input — most modern chargers are compatible.
EAT (UTC+3)
Comorian Franc (KMF) (CF)
Cash in Comorian Franc (KMF) is preferred across most of Comoros outside major hotels and tourist centers. Card terminals are not common in local markets or small restaurants. Withdraw enough cash at a reliable ATM before leaving the city — rural areas may not have ATM access.
Quick tip
Comoros requires passport-based SIM registration for physical SIMs. A travel eSIM bypasses this requirement entirely — no paperwork, no waiting.
Quick tip
Local prices in Comoros are in Comorian Franc (KMF) (CF). eSIM plans are priced in USD, eliminating exchange rate uncertainty.
Step by step
How travelers stop paying carrier rates in Comoros
- Check your phone supports eSIM (iPhone XS or newer, most Samsung Galaxy S20+) — LTE coverage is none on Telma Comoros
- Pick a 1GB Comoros plan on Holafly for $0.90 — payment takes under two minutes and your QR code arrives instantly. Compare providers if you want to see alternatives first.
- Install the eSIM via the QR code Holafly sends to your email — do this before your flight to Prince Said Ibrahim International Airport (HAH) so it activates the moment you land
- On iPhone: tap Settings > Cellular, select your carrier SIM (not the Holafly eSIM), tap Cellular Data Options, and set Data Roaming to off. Full instructions with screenshots in the data roaming guide.
- On Samsung Galaxy at Prince Said Ibrahim International Airport (HAH): open the notification shade, tap the SIM switcher, and select your Holafly eSIM — Telma Comoros registers automatically
- On Google Pixel: go to Settings > Network > Calls and SMS > WiFi Calling and enable it — your home number stays reachable in Comoros without any voice roaming charge
Data tips
How to use less data in Comoros
Posting to social media from Comoros uses more data than browsing. Uploading one photo to Instagram uses about 3-5 MB. A 60-second video upload uses 30-100 MB depending on resolution. Set your camera to 1080p rather than 4K to cut video upload size by 75%.
Regional context
How Comoros compares to other Africa destinations for data
A few things to know before turning off carrier roaming in Comoros:
Archipelago of three islands with varying coverage
French-style power outlets
WiFi mostly limited to upscale hotels in Moroni Roaming passes charge $10/day to fill WiFi gaps. An eSIM covers the same connectivity at $0.90/GB.
Forgot your eSIM?
Comoros eSIM installation after arrival: the WiFi route
You landed in Comoros without an eSIM. Here is what that costs and what you can still do.
All four major providers — Airalo, Holafly, Saily, and Nomad — allow post-arrival purchase and installation over WiFi. You do not need a local SIM to buy an eSIM. Prince Said Ibrahim International Airport (HAH) has free WiFi in the arrivals hall. Connect there, open Airalo or Holafly, and install a 5GB plan at $4.50 before you leave the terminal. If airport WiFi is unavailable, hotel lobby WiFi works as a fallback — most front desks in Comoros give you the password at check-in. Last resort: turn on carrier data long enough to download the eSIM provider app (~5 MB, roughly $10 on AT&T pay-per-use), then switch to the installed eSIM immediately. That one-time charge is far below a full day at AT&T's $12/day rate.
Comoros FAQ
Comoros eSIM & roaming questions
How much does carrier roaming cost in Comoros?
AT&T: $10/day ($70/week). Verizon: $10/day ($70/week). T-Mobile: free but throttled to 256 Kbps; high-speed add-on costs $15/day. Travel eSIM on Telma Comoros: $0.90/GB. All four options route through the same Telma Comoros towers in Comoros. The price gap between carrier roaming and eSIM is $70 versus the eSIM rate for a 7-day trip.
Is T-Mobile's free international data fast enough in Comoros?
No. T-Mobile's free tier in Comoros runs at 256 Kbps — too slow for GPS navigation, video calls, or any app that loads images. You can send basic text messages and that is about it. The high-speed upgrade costs $15/day, matching AT&T's roaming fee. A travel eSIM on Telma Comoros provides full 3G speeds at $0.90/GB with no daily activation triggers.
How is my roaming bill calculated in Comoros?
Relying on hotel WiFi does not prevent roaming charges in Comoros. AT&T's per-day charge fires from any background cellular contact — your phone does not need an active app, just a brief tower handshake. Per-MB billing at $2.05/MB is even more dangerous with background syncs. T-Mobile's 256 Kbps free tier sidesteps per-day billing but is too slow for apps. A travel eSIM at $0.90/GB gives you full 3G and locks the total cost before you board.
Does my phone automatically connect to roaming in Comoros?
Yes, if data roaming is enabled. Your phone latches onto Telma Comoros or another Comoros carrier the moment the plane lands and your carrier bills at roaming rates — $10/day with a plan, or $2.05/MB without one. Disable data roaming on your home SIM before boarding. A pre-installed travel eSIM can be set to activate on arrival without triggering home carrier charges.
Do I need to unlock my phone for an eSIM in Comoros?
Most modern iPhones (XS and later) accept eSIM profiles even when carrier-locked. Android varies by model and carrier — Samsung Galaxy S20+ on AT&T works locked, but some budget Android phones require an unlock first. The safest check: go to Settings > General > About > Digital SIM (iOS) or Settings > Network > SIM Manager (Android). If you see an "Add eSIM" option, your phone is ready for a Comoros eSIM regardless of lock status. When in doubt, contact your carrier to confirm eSIM capability before your trip.
Do US carriers support roaming in Comoros?
AT&T covers Comoros at $10/day. Verizon covers most African countries at $10/day. T-Mobile includes Comoros at 256 Kbps (free but unusable for data-heavy apps). A travel eSIM on Telma Comoros provides full 3G speeds at $0.90/GB — the same carrier infrastructure as roaming, at a fraction of the cost.
Is mobile data reliable enough in Comoros to replace carrier roaming?
Comoros has 2 carriers providing 3G coverage. Urban and tourist areas have solid coverage; rural regions may have gaps. A travel eSIM connects to Telma Comoros — the exact same network carrier roaming uses — at $0.90/GB. Coverage quality is identical to what AT&T or Verizon routes through.
How much does a 10-day trip to Comoros cost in carrier roaming versus an eSIM?
AT&T International Day Pass for 10 days: $100. Verizon TravelPass: $100. T-Mobile high-speed: $150. A travel eSIM on Telma Comoros at $0.90/GB for 10 days at 1.5 GB/day average costs roughly $13.50. The eSIM saves over 80% versus any carrier's paid roaming option. Rates checked June 2026.
Does carrier roaming work in rural areas of Comoros, or only in cities?
Both carrier roaming and travel eSIMs connect through Telma Comoros's towers in Comoros. Coverage outside major cities depends on how widely Telma Comoros has deployed — the same gaps that affect an eSIM also affect AT&T and Verizon roaming. Urban centers and tourist corridors have consistent signal; rural and off-road areas may have limited or no service. There is no coverage advantage to choosing carrier roaming over an eSIM; both are subject to the same Telma Comoros network footprint.
How much does carrier roaming cost for a week in Comoros?
AT&T: $70/week (International Day Pass at $10/day). Verizon: $70/week (TravelPass). T-Mobile: free at 256 Kbps or $105/week for usable speed. The cheapest eSIM for Comoros starts at $0.90/GB on Telma Comoros's 3G network — better per-GB value than all three carriers.
Fact check
eSIM and roaming: facts vs. assumptions for Comoros
Roaming charges only apply to data
US carrier international plans charge separately for data, calls, and texts. AT&T's International Day Pass at $12/day includes data but charges $0.25–$1.50/minute for calls beyond the bundled allocation. Incoming voicemail retrieval can trigger per-minute roaming charges even when you make no outgoing calls. A data-only eSIM in Comoros at $4.50 covers data and uses WhatsApp or FaceTime for voice at no additional carrier cost. Rates checked June 2026.
EU roaming is free for Americans
EU roaming-within-the-EU rules apply only to SIM cards issued by EU-based carriers. AT&T and Verizon are US carriers — they charge full international day pass rates in every EU country. AT&T's International Day Pass runs $12/day in EU destinations. Verizon TravelPass is $10/day. A travel eSIM on Telma Comoros covers Comoros for $4.50 total. Rates checked June 2026.
You need to unlock your phone to use an eSIM
eSIM installation does not require an unlocked phone in most cases. iPhones sold in the US since iPhone 14 are sold unlocked by law. iPhones XS through 13 require unlocking to add a foreign carrier eSIM, but AT&T, Verizon, and T-Mobile all offer free unlocking after your contract ends. Samsung Galaxy S20 and newer models support eSIM on both locked and unlocked variants. Check your carrier's unlock policy before your trip to Comoros.
Our recommendation
Which eSIM to get for Comoros
If you want the most straightforward option for Comoros, go with Nomad. Nomad offers the lowest per-GB rate for Comoros at $0.90/GB on Telma Comoros. The checkout takes under 2 minutes and QR code delivery is instant. A 5GB plan at $4.50 covers a week of maps, messaging, and social media. Airalo is the pick if you want regional bundles or multi-country coverage from a single eSIM.
Stop paying $6/day to roam in Comoros
Carrier day passes add up: 7 days x $6/day = $42. One eSIM plan covers the same trip for $0.90.
Get a Comoros eSIM