Montserrat · roaming cost calculator
Montserrat Roaming Price Audit: $120 on AT&T, $149.76 on an eSIM
HelloRoam is the top pick for Montserrat on this site's rubric, though its 7-day unlimited plan there costs $99.36, at full speed for the first 2 GB a day, above the $84 a week on AT&T's $12-a-day pass, so for one week the day pass costs less, and Holafly ranks second on this site's rubric. HelloRoam refunds an unactivated eSIM for 180 days. Airalo covers 200+ destinations to HelloRoam's 185. HelloRoam's price is from its catalogue of 29 Oct 2026, rivals' from the 30 Oct 2026 price check; AT&T's rate was checked June 2026.
The Montserrat audit below runs in dollars because the carrier bills in dollars. HelloRoam prices checkout in 31 currencies, so a $149.76 purchase can be paid without a dollar conversion.
Montserrat eSIM market: plan tiers and pricing
For a short trip to Montserrat, HelloRoam's smallest fixed plan is $9.63 for 1 GB over 7 days, on a local network. One day of AT&T roaming costs $12.
Get eSIMIn Montserrat, Holafly rides local network infrastructure with no data ceiling. A 7-day unlimited plan has a median price of $27.50 across the 35 countries checked 30 Oct 2026; AT&T charges $84 for the same week on the same towers.
Get eSIMNomad offers straightforward Montserrat plans on a local 4G LTE network from $2.30/GB. Simple checkout, no frills.
Get eSIMFLOW covers major cities, motorways, and rail corridors in Montserrat. Airalo sells into that market at $2.40/GB; rural dead zones affect both the eSIM and AT&T roaming equally.
Get eSIMSaily sells Montserrat data at $2.60/GB with VPN included. Travelers who regularly use public WiFi in cafes, hotels, or transit hubs avoid paying $13/month for a separate VPN 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
Montserrat roaming add-on costs across four carriers
Every major carrier's published Montserrat rate, side by side, with the eSIM winner highlighted.
| Carrier | Plan type | Daily | 7-day | Speed | Data limit |
|---|---|---|---|---|---|
| AT&T | International Day Pass | $12.00source | $84.00 | LTE | Plan data |
| Verizon | TravelPass | $12.00source | $84.00 | LTE | Plan data |
| T-Mobile | International Pass | $10.00*source | $50.00 | LTE | 2GB per 1 Day pass |
| Xfinity Mobile | International Pass | $10.00source | $70.00 | LTE | 200 MB/day |
| eSIM · HelloRoam | 20GB data plan | — | $149.76 | 4G LTE | 20GB |
*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. The 1 Day International Pass costs $10; the 7-day figure is the cheapest pass mix, 10-day pass.
* Xfinity Mobile International Pass: $10/day with 200 MB/day high-speed cap
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
The cost of forgetting your international plan in Montserrat
AT&T's international pay-per-use rate is $2.05/MB in Montserrat. Mixed phone use — maps, messaging, and social media — runs about 60 MB/hour. One hour of that: $123. Four hours of normal use: $492. Eight hours, a full day out: $984. A 30-minute Zoom meeting alone adds $922. A 5-minute video call with family costs $154. These are AT&T's published pay-per-use figures. Source: AT&T international rate card, June 2026.
Personalize your savings
Your Montserrat 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 Montserrat: $120 on an AT&T day pass at $12 a day, against $149.76 for a 20GB travel eSIM. Both prices buy access to the same local operators.
Network coverage
Which networks operate in Montserrat
Local operators own every tower in Montserrat, FLOW among them. Your carrier rents those towers at $12/day for roaming. A travel eSIM rents those same towers at $6.51/GB. Your phone's radio connects to a local network either way. The difference is which billing layer sits above that connection. FLOW operates 4G LTE on standard LTE bands in Montserrat. Your phone accesses those bands identically on a carrier roaming pass and a travel eSIM. The speed ceiling is 4G LTE under both billing models.
Network attachment record
The networks behind both prices in Montserrat
HelloRoam publishes one local operator for Montserrat: FLOW.
One operator means no fallback network.
Where FLOW has no signal, an eSIM has nowhere else to attach.
HelloRoam records no 5G operator for Montserrat.
Carrier roaming meets the same ceiling, because roaming rents local networks.
Price is what separates the two options in Montserrat. This page prices both.
5G and 4G here are capability labels. Neither one is a speed reading.
FLOW carry the eSIM in Montserrat. Across the whole file HelloRoam names 154 operators over 185 destinations, 117 of them with a single operator and 1.48 on average. Roaming buys wholesale access to that same list.
| Operator | Network generation on file |
|---|---|
| FLOW | 4G |
Source: HelloRoam package feed, read 17 August 2026. The feed publishes an operator list for every destination it sells. No speed test sits behind this table, and we ran none. The full operator map covers 185 destinations.
Pricing breakdown
How roaming and eSIM costs compare in Montserrat
A 14-day trip to Montserrat costs this in carrier roaming: AT&T $120, Verizon $168, T-Mobile high-speed $75. Subtract the eSIM cost ($65.10 for a 10GB plan on a local network) and the gap is $54.90 vs AT&T.
Each day AT&T connects you to FLOW in Montserrat costs $12. Buy a 10GB eSIM plan at $65.10 and that same daily access drops to $4.65/day. Over 14 days, the difference is $54.90.
eSIM pricing for Montserrat: 1GB at $9.63 ($9.63/GB), 3GB at $22.73 ($7.58/GB), 5GB at $35.66 ($7.13/GB), 10GB at $65.07 ($6.51/GB), 20GB at $149.76 ($7.49/GB). AT&T's 14-day roaming bill is $120 regardless of data consumed. Unlimited eSIM data costs $180.66 for the same period, $-60.66 less.
The unlimited ladder for Montserrat reads 1 day at $16.13, 3 days at $45.97, 7 days at $99.36, 14 days at $180.66, 30 days at $329.05. Unlimited here means 2GB a day at full speed before a fair-use policy applies. At 30 days the rate is $10.97 a day. Catalogue prices read 29 Oct 2026.
Trip cost breakdown
Weekend, two-week, and month-long trips to Montserrat: carrier vs eSIM
AT&T bills $12/day for roaming in Montserrat — 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 $22.73 for 3 days — $0.32/hour at continuous use. Difference for a 3-day trip: $13.27.
Over 14 days, AT&T's per-hour rate stays at $0.36. A 20GB eSIM on a local network for 15GB averages $0.45/hour over the same 14 days. AT&T total: $120. eSIM total: $149.76. Difference: $-29.76.
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 $345.06 — $0.48/hour. Total difference over 30 days: $-225.06 (-188%). Rates checked June 2026.
Airport options
Airport SIM options in Montserrat
Airport SIM shops in Montserrat primarily serve the local language market. Staff English proficiency varies and getting help with plan options takes longer when there is a language gap. An eSIM purchased online comes with English-language support and app-based troubleshooting — no language barrier between you and your 1GB data plan at $9.63.
Data planning
Planning your data usage in Montserrat
In Montserrat, mobile data fills in where WiFi is unavailable. Expect to use 1.5 GB per day across maps, messaging, and social media. A 20GB plan at $149.76 covers 11GB for 7 days.
At $149.76 for 20GB, you get roughly 256 hours of social media browsing, about 36 hours per day over 7 days. AT&T charges $12 a day, $84 in total, for the same data on a local network. For heavy data users, a 1-day unlimited plan costs $16.13, not under AT&T's $12/day pass.
Connectivity
Montserrat WiFi reliability for travelers
Cafe WiFi in Montserrat is open and unencrypted — fine for general browsing, risky for banking or work logins. Coverage is sparse outside cities. A travel eSIM on a local network gives you a private cellular connection for sensitive apps at $6.51/GB.
Plan your data
Montserrat data allowance guide for travelers
Summer travel to Montserrat means peak hotel rates, peak airfare, and AT&T roaming at $12/day on top. A 10-day trip generates $120 in AT&T charges alone. A 20GB eSIM on a local network at $149.76 removes that line item — saving $-29.76 regardless of when you travel.
Montserrat has one mobile operator: FLOW. US carriers pay FLOW for roaming access and pass that cost to you at $12/day. An eSIM connects to FLOW directly at $6.51/GB — no carrier markup.
Local prices in Montserrat are in XCD (EC$), but eSIM plans are priced in USD, eliminating exchange rate uncertainty on your data costs.
Quick reference
Montserrat Travel Essentials
999/911
999, 911 are the emergency numbers in Montserrat. 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 A/B
US plugs (Type A flat two-prong and Type B three-prong) fit Montserrat's outlets directly. No adapter is needed for phones, laptops, or standard US electronics. Voltage is 120V — compatible with dual-voltage US chargers.
AST (UTC-4)
XCD (EC$)
Cash in XCD is preferred across most of Montserrat outside major hotels and tourist centers. Card terminals are not common in local markets or small restaurants. Withdraw enough cash at a reliable ATM before leaving the city — rural areas may not have ATM access.
Good to know
One operator, FLOW, runs all mobile coverage in Montserrat. Carrier roaming and eSIM plans use the same infrastructure — comparing costs is the only meaningful variable.
Quick tip
Montserrat uses XCD (EC$). eSIM plans charge in USD at the time of purchase — you lock in the cost before travel and avoid in-country exchange rate moves.
Step by step
Montserrat eSIM installation guide
- First time using an eSIM: call your carrier or check Settings > General > About > Carrier Lock on iPhone to verify your device is unlocked — Montserrat eSIMs require an unlocked phone
- Returning HelloRoam user: log in, select Montserrat from recent destinations, and repurchase the 1GB plan at $9.63 — saved payment details cut checkout to under 30 seconds. Compare providers to make sure you're still getting the best rate.
- Returning user: if HelloRoam supports direct eSIM activation (no QR required), tap Activate in the app and your Montserrat profile installs automatically before you leave home so it is ready to activate on arrival
- Disable data roaming on your carrier SIM in Settings > Cellular > Cellular Data Options. See the step-by-step guide to turning off data roaming for screenshots.
- Switch your active data line to the eSIM when you land in Montserrat and you will be on LTE within seconds
- Use WiFi Calling on your home SIM line so you can receive calls and texts without paying roaming voice rates
Data tips
Reducing data consumption on a Montserrat trip
Video call data usage varies by platform: FaceTime audio 30 MB/hour, FaceTime video 200 MB/hour, Zoom at 720p 540 MB/hour, Google Meet standard quality 450 MB/hour. Switch video off during work calls from Montserrat to drop data usage from 500 MB/hour to under 50 MB/hour.
Regional context
Caribbean traveler data guide: Montserrat edition
A few things to know before turning off carrier roaming in Montserrat:
Half the island is an exclusion zone around volcano
Nearby
Related destinations
6 destinations near Montserrat 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 Aruba at $3.99 a gigabyte.
Forgot your eSIM?
Post-arrival eSIM options in Montserrat
If you reach Montserrat without an eSIM, your first 30 minutes at the airport determine your data costs. Most airports in Montserrat have free WiFi near arrivals. Connect as soon as you clear customs. From there, HelloRoam, Holafly, Nomad, Airalo, and Saily all support post-arrival eSIM purchases. The process: download the app over WiFi, choose a Montserrat plan, scan the QR code, and activate. A 1GB plan on a local network costs $9.63, against $24 for two days on AT&T's International Day Pass. If airport WiFi drops mid-install, hotel lobby WiFi provides a stable fallback for finishing the process.
Savings math
How much you save in Montserrat
Solo traveler
Verizon TravelPass for 10 days in Montserrat: $120. That is $12 for each 24-hour session, and a session starts on any network contact, including a background email sync. A 20GB eSIM on a local network costs $149.76 and does not bill per day. Savings: $0 (0%). Same 4G LTE network.
Family trip
A family of four on AT&T visiting Montserrat for 10 days: 4 lines x $12/day x 10 days = $300. Four individual 20GB eSIMs on a local network: $599.04. Family savings: $-299.04. Alternative: two eSIMs with tethering for two devices each costs $299.52 total. That cuts the family data bill to 100% of AT&T roaming.
AT&T roaming rate analysis
AT&T International Day Pass charges $12/day in Montserrat. Each charge covers 24 hours from the first time your phone uses a local network, including background syncs from email, iCloud, and app updates, and AT&T bills at most 10 daily fees per line each bill cycle. Cost by duration: 7 days = $84. 10 days (average Montserrat trip) = $120. 30 days = $120. Without the $12/day Day Pass, AT&T's pay-per-use rate is $2.05/MB, which reaches $2,099/GB. AT&T Prepaid customers cannot add Day Pass and pay this rate automatically. A 20GB eSIM on a local network costs $149.76 for 10 days. Savings: $-29.76 (-25%).
All-carrier summary
AT&T: AT&T International Day Pass costs -20% more than an eSIM for Montserrat.
Verizon: Verizon TravelPass costs less than this eSIM plan for Montserrat.
T-Mobile: T-Mobile's International Passes cost less than this eSIM plan for Montserrat.
Against AT&T: $0 saved (0%). Against Verizon: $0 saved. Against T-Mobile's International Pass at $10/day: $0 saved. Against T-Mobile free tier: $0 carrier cost, but the throttle renders maps, ride-hailing, and video calls unusable. A 20GB eSIM at $149.76 delivers full 4G LTE on a local network for less than any paid roaming option.
Quick answers
Common questions about Montserrat data costs
Is eSIM cheaper than roaming in Montserrat?
The eSIM price for Montserrat starts at $149.76 for 20GB on a local network. AT&T roaming for the same 10-day trip runs $120 at $12/day. That is a $0 gap on the same cell towers. For a family of four, the combined savings reach $0. Rates checked June 2026.
How much does roaming cost in Montserrat?
US carriers charge $12/day for Montserrat roaming. UK carriers charge approximately GBP6/day. A 10-day trip costs $120 on AT&T or Verizon. A travel eSIM on a local network costs $149.76 for 20GB. Rates checked June 2026.
Does T-Mobile work in Montserrat?
Yes, T-Mobile connects to a local network in Montserrat. 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. The 1 Day International Pass costs $10. A travel eSIM at $149.76 for 20GB provides full 4G LTE speed on the same local towers. Rates checked June 2026.
AT&T fine print for Montserrat
$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.
Montserrat FAQ
Montserrat eSIM & roaming questions
Montserrat carrier roaming costs $12 a day on AT&T and on Verizon
For a 14-day trip: AT&T roaming costs $120, Verizon $168, T-Mobile's passes $75 (30-day pass). Travel eSIM plans price data as a bucket rather than a day, so 14 days costs the same as 5 at $9.63 for 1GB. Cross a border and the split between the five providers matters: Airalo reaches 200+ destinations, Nomad 200, HelloRoam 185 and Holafly 200+. This site states no Saily count. A multi-country route is the one case where paying more per gigabyte for wider coverage is the cheaper decision. Rates checked June 2026.
T-Mobile's included data in Montserrat runs at high speed until the allowance ends
Only until the allowance runs out. 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 text messaging works and maps slow down. T-Mobile's 1 Day International Pass costs $10 for 2GB, and its 10-day pass $50 for 15GB. Five eSIM providers deliver full 4G LTE on a local network instead, from $6.51/GB. Carrier rates checked June 2026; eSIM prices from the 30 Oct 2026 price check.
Montserrat roaming bills by the day, not by the gigabyte
AT&T bills $12 per 24 hours from the first time your phone touches a Montserrat tower, at most 10 fees per line each bill cycle. Verizon matches that rate. Without a pass, each megabyte costs $2.05, so one accidental gigabyte reaches $2,099. T-Mobile's Experience plans include 5GB or 15GB of high-speed data abroad, then up to 256Kbps. An eSIM bucket at 1GB for $9.63 sidesteps all three: pay once, use it until the data runs out, and face no overage. The catch is the reverse of the carriers' catch. Run the bucket dry and you buy another one, so size the plan against your real usage. Rates checked June 2026.
Hotspot caps differ by provider on Montserrat plans
Holafly is the one to check. Its unlimited plans cap mobile hotspot at 1 GB a day, which is the trade for uncapped data on the phone itself. Fixed-data plans from Nomad, HelloRoam, Saily, and Airalo let you spend the bucket however you like, tethering included, because a gigabyte shared with a laptop is the same gigabyte. Read the plan page anyway, since a small number of budget plans restrict hotspot use. AT&T allows hotspot under International Day Pass at $12/day per line, or $84 across a week in Montserrat. If the laptop is the point of the trip, buy fixed data on FLOW at $6.51/GB rather than an unlimited day plan. Rates checked June 2026.
Unlimited Montserrat plans carry a daily full-speed allowance and a fair-use policy
Every unlimited plan for Montserrat carries one. Past a daily high-speed allowance the connection slows, and the plan stays live rather than stopping. Providers state the threshold in their terms, and the reduced speed is not something we can verify, so read "unlimited" as uncapped billing rather than uncapped speed. HelloRoam's 7-day unlimited plan has the lowest median of the five at $21.50 across 35 countries, against $27.50 on Holafly, and HelloRoam's plan runs at full speed for 2 GB a day in 33 of those 35 countries. Holafly states no daily cap, with mobile hotspot capped at 1 GB a day on most plans. On a short Montserrat trip a fixed bucket at $6.51/GB on FLOW often costs less than any day rate. AT&T's $12/day pass draws on your home plan and inherits its own soft cap. Carrier rates checked June 2026; eSIM prices from the 30 Oct 2026 price check.
US carrier roaming in Montserrat runs $10 to $12 a day
AT&T charges $12/day in Montserrat on International Day Pass. Verizon charges $12/day on TravelPass. T-Mobile includes Montserrat at a reduced speed, or $10/day on the International Pass. A 7-day trip: AT&T $84 at $12/day, Verizon $84, T-Mobile $50. A travel eSIM on FLOW at $6.51/GB costs roughly $68.36 for the same week. Rates checked June 2026.
A cruise leaving Montserrat prices data differently from land travel
On land in Montserrat, both options connect through local 4G LTE towers with no meaningful difference. On a cruise ship, neither carrier roaming nor a travel eSIM applies — ships use maritime satellite networks billed separately by the cruise line at $15-30/day. Buy the cruise WiFi package for onboard connectivity. Use the eSIM or carrier roaming only when the ship is docked and you are on shore.
A Caribbean regional plan against single-country Montserrat coverage
Your itinerary settles it. For Montserrat alone, a country-specific eSIM at $6.51/GB is the right buy. For several islands, a regional Caribbean plan holding all the stops in one data bucket usually costs less than separate eSIMs. Check the coverage list first, because the five providers draw the region differently: Airalo and Holafly each cover 200+ destinations to HelloRoam's 185, so HelloRoam, with the lowest median 5 GB rate at $2.01/GB, lists fewer destinations than those two. AT&T and Verizon charge $12/day per country, so four islands at two days each bills $96. Carrier rates checked June 2026; eSIM prices from the 30 Oct 2026 price check.
T-Mobile's free tier in Montserrat sits below what maps and video need
T-Mobile's free international tier in Montserrat is capped far below a usable speed. That speed supports plain text messages and basic email without attachments. It does not support Google Maps navigation, WhatsApp photo sending, or ride-hailing apps. T-Mobile's International Pass runs $10/day, under AT&T and Verizon at $12/day. A travel eSIM on FLOW at $6.51/GB delivers full 4G LTE with no speed cap.
A week of Montserrat 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 Montserrat starts at $6.51/GB on a local 4G LTE network — better per-GB value than all three carriers.
Fact check
Common myths about roaming and eSIM in Montserrat
Carrier roaming is more reliable than an eSIM
Reliability is determined by the local carrier's network, not the billing layer above it. AT&T roaming in Montserrat routes through a local network. A travel eSIM also routes through a local network. Both connections depend on local network coverage in any given area. AT&T charges $12/day for a connection with zero reliability advantage over the $9.63 eSIM.
Pay-per-use international data rates are reasonable
AT&T's pay-per-use international data rate is $2.05/MB without an active plan. At that rate, 1 GB costs $2,099. A single Google Maps navigation session in Montserrat loads 50–100 MB — that is $102–$205 at pay-per-use. A 1GB eSIM on a local network costs $9.63 for the same data. Always activate a day pass or eSIM before your flight. Rates checked June 2026.
T-Mobile includes free international data
T-Mobile's Experience plans include 5GB or 15GB of high-speed data abroad, then up to 256Kbps, too slow to load a map tile in Montserrat past the allowance. Its 1 Day International Pass costs $10. Exception: T-Mobile does not charge for calls, texts or data in Mexico and Canada; depending on the plan, up to 30GB is at high speed, then up to 256Kbps. Montserrat is not on that list. Rates checked June 2026.
Our recommendation
Montserrat mobile data: carrier charges vs eSIM price
Our pick for Montserrat: HelloRoam. HelloRoam covers Montserrat on a local network and scores 9.9/10 on our rubric, the highest of the 5 providers we price. A 1GB plan costs $9.63. Unactivated plans are refundable for 180 days, and its support replies in your own language. Holafly is the alternative for heavy data users: it states no daily cap, at a 7-day unlimited median of $27.50 on 30 Oct 2026.
Learn more
Travel guides, Montserrat
4 guides carry the parts of a Montserrat 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.
Montserrat eSIM vs AT&T roaming: the price difference
Install an eSIM before you fly. It activates when you land in Montserrat.
Get a Montserrat eSIM