Comoros · roaming cost calculator
Roaming Price Audit: What 10 Days of Data Cost in Comoros
HelloRoam, first on this site's rubric, does not sell Comoros: its catalogue of 29 Oct 2026 lists 185 destinations. In Africa it sells 41 destinations, among them Algeria, Angola and Benin, so a trip that continues there can switch to it. HelloRoam's 7-day unlimited plan has a median price of $21.50 across the 35 countries where all five providers were priced.
Two prices sit on this page. AT&T bills $12 a day for Comoros and travel eSIM data at $2.99 a gigabyte bills once, both in dollars. HelloRoam bills in 31 checkout currencies.
Airalo covers 200+ destinations to HelloRoam's 185, one column the rival wins outright.
Which eSIM providers cover Comoros networks
HelloRoam, first on this site's rubric, sells 185 destinations and Comoros is not one of them, so this page ranks no provider here. The four below list Comoros plans; Airalo covers 200+ destinations to HelloRoam's 185.
Holafly prices by the day, not the gigabyte. In Comoros on a local 3G network: if you use under 2GB per trip, a per-GB plan from Airalo or Nomad will cost less.
Get eSIMNomad's Comoros plan runs on local infrastructure at $2.30/GB. The checkout flow takes under two minutes — no account required for first-time buyers.
Get eSIMAiralo's app shows real-time data usage, so you can see how much of a Comoros plan is left. Plans start at $2.40/GB on a local 3G network.
Get eSIMTelma Comoros is one of Comoros's 3G operators. At $2.60/GB, Saily's plan includes VPN protection that costs $13/month as a standalone NordVPN subscription.
Get eSIMCompare providers: Airalo vs Holafly · Airalo vs Saily · Airalo vs Nomad · Airalo vs HelloRoam · Holafly vs Saily · Holafly vs Nomad · Holafly vs HelloRoam · Saily vs Nomad · Saily vs HelloRoam · Nomad vs HelloRoam
The full picture
AT&T, Verizon and T-Mobile rates, 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 | £6.85source | £47.95 | LTE | Fair-use |
| AT&T | International Day Pass | $12.00source | $84.00 | LTE | Plan data |
| Verizon | TravelPass | $12.00source | $84.00 | LTE | Plan data |
| eSIM · Holafly | Sold by the gigabyte | — | $2.99/GB | 3G | Your choice |
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
Your Comoros saving against $12 a day
Adjust the trip length, the carrier and the daily data below and the calculator reprices both sides. The starting point is the 10-day average stay recorded for Comoros: $120 on an AT&T day pass at $12 a day, against $2.99 a gigabyte on a travel eSIM. Both prices buy access to the same local operators.
Network coverage
Comoros roaming network partnerships explained
Verizon TravelPass connects to a local network in Comoros at $12/day. A travel eSIM connects to the same local network at $2.99/GB. Same signal, same speed, same carrier towers. Different price tag. Travel eSIM providers deliver the same 3G signal for less. 3G download and upload speeds are available on a local network in Comoros. A carrier roaming pass delivers those speeds. A travel eSIM delivers the same speeds. Paying $12/day does not increase your download speed over the $2.99/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: $12 per 24 hours, $120. Verizon TravelPass: $168. T-Mobile International Passes: $75 (30-day pass). eSIM 10GB plan on a local network: $29.90. That is $90.10 less than AT&T, a 75% reduction for the same 3G connectivity.
The eSIM daily rate works out to $2.14 when spread across 14 days. AT&T charges $12/day, which is 5.6x that figure. T-Mobile's high-speed pass is $10/day. All three connect to the same local 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 $12/day for roaming in Comoros — that is $0.50/hour around the clock, whether your phone is in your pocket or active. A 2GB eSIM on a local network costs $5.98 for 3 days — $0.08/hour at continuous use. Difference for a 3-day trip: $30.02.
Over 14 days, AT&T's per-hour rate stays at $0.36. A 15GB eSIM on a local network for 15GB averages $0.13/hour over the same 14 days. AT&T total: $120. eSIM total: $44.85. Difference: $75.15.
A 30-day stay at $0.17/hour on AT&T reaches $120. A 50GB eSIM on a local network covering 50GB for video calls and streaming costs $149.50 — $0.21/hour. Total difference over 30 days: $-29.50 (-25%). 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 $14.95 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 $14.95. AT&T's equivalent roaming: $84.
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 a local network 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 $120 for 10 days. A 5GB eSIM costs $14.95 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 $2.99/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 $2.99/GB instead of AT&T's $12/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 data size for Comoros on Holafly, which prices from $2.99 a gigabyte — 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 $12/day to fill WiFi gaps. An eSIM covers the same connectivity at $2.99/GB.
Nearby
Related destinations
6 destinations near Comoros are priced on the same rate card. AT&T bills $12 a day in every one of them, and the figure beside each flag is that destination's own per-gigabyte floor. The cheapest of the group is Algeria at $1.23 a gigabyte.
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 5 providers — HelloRoam, Holafly, Nomad, Airalo, and Saily — 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 a provider's app, and install a 5GB plan ($14.95 in this site's catalog) 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 charge lands once, unlike AT&T's $12/day pass, which bills again every day of the trip.
Savings math
How much you save in Comoros
Solo traveler
A solo traveler on AT&T International Day Pass in Comoros for 10 days: 10 days × $12/day = $120. A 15GB eSIM on a local network costs $44.85 for the same 10 days. Savings: $75.15 (63%). Both options connect to local 3G towers. The arithmetic is simple: one fixed payment versus 10 daily charges.
Family trip
A family that takes two international trips per year saves $241.20 annually by switching from AT&T roaming to eSIMs. Per trip: AT&T bills $300 for 4 lines over 10 days ($12 for the first line and $6 for each extra line, per day billed). Four eSIMs cost $179.40 per trip. Over five years, the cumulative savings reach $1206.
AT&T roaming rate analysis
AT&T bills International Day Pass per line, not per account. A family plan with 4 lines in Comoros: $12 for the first line and $6 for each of the other three = $30/day. For 10 days: $300. Even lines that barely use data still trigger the full daily charge. A child's phone syncing a game update overnight starts a $6 extra-line fee for that line. Four 15GB eSIMs: $179.40 total. Savings for the family: $120.60.
All-carrier summary
AT&T: AT&T International Day Pass costs 168% more than an eSIM for Comoros.
Verizon: Verizon TravelPass costs 168% more than an eSIM for Comoros.
T-Mobile: T-Mobile's International Passes cost 11% more than an eSIM for Comoros.
Vodafone: Vodafone bills Comoros in pounds and this site holds no pound-to-dollar rate, so it states no Vodafone-versus-eSIM gap.
The savings math for Comoros is clear. Solo: $75.15 saved vs AT&T for 10 days. Family of four: $120.60 saved. Annual (2 trips): $150.30 saved. All figures use the same local 3G network. The eSIM costs less at every trip length and every group size.
Quick answers
Common questions about Comoros data costs
Is eSIM cheaper than roaming in Comoros?
In Comoros, a travel eSIM on a local network costs $44.85 for 15GB over 10 days. AT&T roaming charges $12 a day, $120 for the same duration on the same towers. The eSIM cuts the data bill by 63%. This applies to both AT&T and Verizon, which charge the same $12/day rate. Rates checked June 2026.
How much does roaming cost in Comoros?
AT&T roaming in Comoros costs $12 for each 24 hours from the first time your phone connects to a local network. The charge triggers on background data sync at landing, not intentional use. A 10-day trip costs $120. An eSIM: $44.85 flat. Rates checked June 2026.
Does T-Mobile work in Comoros?
Yes, within the plan's allowance. T-Mobile's Experience More plan includes 5GB of high-speed data abroad and Experience Beyond 15GB, then data runs at up to 256Kbps. Essentials includes texting but no data. At 256Kbps Google Maps and ride-hailing apps stall. T-Mobile's 1 Day International Pass costs $10 for 2GB, and a week of passes $50 (10-day pass). A travel eSIM on a local 3G network costs $44.85 for 15GB over 10 days. Rates checked June 2026.
AT&T fine print for Comoros
$12 covers 24 hours from the first time your phone uses a foreign network, and a single background push notification at 2 AM can start it. AT&T bills at most 10 daily fees per line each bill cycle (terms read 31 Oct 2026).
iCloud Photos, email push, app updates all trigger the daily charge. A phone left in a bag with data roaming on starts a new $12 fee each time a sync lands after the last 24 hours ran out.
Comoros FAQ
Comoros eSIM & roaming questions
Comoros carrier roaming costs $12 a day on AT&T and on Verizon
AT&T: $12/day, or $84 a week. Verizon: $12/day. T-Mobile: 5GB or 15GB of high-speed data included on Experience plans, then at a reduced speed, or $10 for a 1 Day pass with 2GB. Travel eSIM on a local network: from $2.99/GB. On the median 5 GB plan, fixed rates run from $2.01/GB on HelloRoam to $2.60/GB on Saily. HelloRoam's 7-day unlimited plan has the lowest median of the five at $21.50 across 35 countries, against $27.50 on Holafly. Every option above routes through the same local towers in Comoros. Difference for 7 days against AT&T on that HelloRoam plan: $62.50. Carrier rates checked June 2026; eSIM prices from the 30 Oct 2026 price check.
T-Mobile's included data in Comoros runs at high speed until the allowance ends
Not past the allowance. T-Mobile's Experience More plan includes 5GB of high-speed data abroad and Experience Beyond 15GB, then data runs at up to 256Kbps. Essentials includes texting but no data. A photo message runs 2 MB to 4 MB, about two minutes at 256Kbps, so it drags from Comoros. A travel eSIM delivers full 3G on a local network from $2.99/GB, and HelloRoam at $2.01/GB holds the lowest median 5 GB rate in the market, Nomad next at $2.30. Carrier rates checked June 2026; eSIM prices from the 30 Oct 2026 price check.
Comoros roaming bills by the day, not by the gigabyte
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 sidesteps per-day billing up to its plan's high-speed allowance, then runs at up to 256Kbps. A travel eSIM at $2.99/GB gives you full 3G and locks the total cost before you board.
Coverage lists decide which provider suits a Comoros trip with extra stops
HelloRoam, first on this site's rubric, does not sell Comoros, so this leg needs another provider even though HelloRoam holds the lowest median 5 GB rate here, $2.01/GB, across its 185 destinations. For a route that adds stops, check each list before the price: Airalo reaches 200+ destinations, Nomad 200 and Holafly 200+. This site states no Saily count. That breadth is worth paying for only when the itinerary is still moving. A regional plan covering several countries in one bucket beats one plan per stop. AT&T sidesteps the question by charging $12 per 24 hours in every country alike, which is simple and expensive: three countries over nine days still bills $108. Carrier rates checked June 2026; eSIM prices from the 30 Oct 2026 price check.
A phone landing in Comoros attaches to a local network on its own
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 — $12/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.
US carriers reach Comoros through its local operators
AT&T covers Comoros at $12/day. Verizon covers most African countries at $12/day. T-Mobile includes 5GB or 15GB of high-speed data included on its Experience plans, then up to 256Kbps in Comoros. A travel eSIM on Telma Comoros provides full 3G speeds at $2.99/GB — the same carrier infrastructure as roaming, at a fraction of the cost.
Comoros mobile data carries the same load for an eSIM and for 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 the same local networks carrier roaming uses, at $2.99/GB. Coverage quality is whatever the local network delivers, and it is the same either way.
A 10-day Comoros trip costs $120 in carrier roaming
AT&T International Day Pass for 10 days at $12/day: $120. Verizon TravelPass at $12/day: $120. T-Mobile's International Pass at $10/day: $50. A travel eSIM on Telma Comoros at $2.99/GB for 10 days at 1.5 GB/day average costs roughly $44.85. The eSIM saves over 80% versus any carrier's paid roaming option. Rates checked June 2026.
Rural Comoros coverage is an operator limit, not a roaming limit
Both carrier roaming and travel eSIMs connect through local networks in Comoros, and Telma Comoros is one of them. Coverage outside major cities depends on how widely those networks have deployed, and the same gaps hit an eSIM and AT&T or Verizon roaming alike. 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.
A week of Comoros carrier roaming costs $84
AT&T: $84/week (International Day Pass at $12/day). Verizon: $84/week (TravelPass). T-Mobile: 5GB or 15GB of high-speed data included on its Experience plans, then up to 256Kbps, or $50 for a week of passes (10-day pass). The cheapest eSIM for Comoros starts at $2.99/GB on a local 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 $14.95 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 $12/day. A travel eSIM on a local network covers Comoros for $14.95 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 Airalo. Comoros is a thin eSIM market and we could not price a plan tier here. Airalo and Holafly each list 200+ destinations, the highest count this site prints, so it is among the likeliest of the five to stock Comoros on a local network. Holafly is the alternative, at 200+ destinations with a 180-day refund window if the plan turns out not to cover you.
Learn more
Travel guides, Comoros
4 guides carry the parts of a Comoros trip this page does not price: installing the profile before departure, switching data roaming off on the home SIM, and what happens to the allowance once a fair-use policy applies. Each one reads the same rate card as this page, where AT&T bills $12 a day.
Comoros data by the gigabyte from $2.99 vs $12/day on AT&T
eSIM data for Comoros starts at $2.99 a gigabyte. AT&T roaming starts from $12/day whether you use data or not.
Get a Comoros eSIM