Our Testing in Montserrat
We evaluated eSIM options for Montserrat using provider plan data and FLOW's network specifications. 1 carrier network accept eSIM roaming connections in Montserrat: FLOW. 6 plans from 5 providers form the basis of our comparison. Pricing starts at $7.47/GB on 4G LTE.
FLOW is the sole eSIM-accepting carrier in Montserrat. All five providers route through this single network, which means coverage depends entirely on FLOW's infrastructure.
The pricing ladder spans from 1GB at $10.98 ($10.98/GB) to 20GB at $164.45 ($8.22/GB). Best per-GB value sits at 10GB for $74.66 ($7.47/GB), our recommended tier for most Montserrat travelers. Holafly adds an unlimited daily option at $18/day, which suits heavy data users on trips of 5+ days. All fixed-data plans deliver full 4G LTE speed until the data cap is reached, with no mid-plan throttling.
Network coverage in Montserrat concentrates around urban centers and major transport routes. FLOW provides the most consistent signal for travel eSIM users.
The Montserrat rankings put HelloRoam at 9.5/10, ahead of Airalo at 9.3/10. These scores reflect Montserrat-specific conditions: FLOW routing, 6 available plans, and 4G LTE as the network standard. Rankings may differ for neighboring Caribbean destinations where carrier partnerships and plan availability change.
What We Tested
We ranked 6 eSIM plans from 5 providers for Montserrat across five dimensions: Coverage (25%), Pricing (25%), Speed (20%), App Quality (15%), Support (15%). Each provider was scored 1-5 per dimension with a weighted total converted to a /10 display score.
How We Scored
Scores for Montserrat use our standard weighted formula: Coverage (25%), Pricing (25%), Speed (20%), App quality (15%), and Support (15%). Each dimension receives a raw score from 1 to 5. The composite multiplies by 2 for a 0-10 display scale. Coverage and Pricing carry equal top weight because for travel eSIMs, network reach and cost matter most.
Country-specific adjustments for Montserrat: Single-carrier markets like Montserrat receive a ceiling of 4.0/5 on Coverage, since no failover redundancy exists. Unlimited plan availability in Montserrat adjusts the Pricing dimension to weight per-day unlimited rates alongside per-GB fixed rates. These calibrations keep scores comparable across the 185+ destinations in our database.
The scoring spread across 5 providers for Montserrat is 1.5 points (HelloRoam at 9.5/10 down to Nomad at 8.0/10). A spread under 1.5 points indicates that all providers deliver comparable service for this destination. The wider gap here reflects meaningful differences in pricing, coverage, or support quality.
Read our full testing methodology.
Speed scores use provider-reported network data. We have not independently measured download speeds in Montserrat.
Montserrat Network Landscape
Montserrat has 1 mobile network: FLOW (4G). FLOW delivers the strongest coverage combination. All 5 providers route through these carriers.
Carrier Partnerships
Montserrat operates 1 mobile network: FLOW (4G). FLOW serves as the primary routing partner for travel eSIMs in this market. All five ranked providers route exclusively through FLOW. Single-carrier markets offer no failover, which affects the Coverage dimension of our scoring.
FLOW's 4G LTE infrastructure delivers speeds consistent with the Caribbean regional average for travel eSIM connections. Single-carrier coverage means no automatic failover. Coverage quality depends entirely on FLOW's tower infrastructure and geographic reach in Montserrat.
FLOW's 4G LTE network handles all travel eSIM traffic in Montserrat. Provider differentiation comes from plan pricing ($7.47/GB entry), app features, and support channels rather than carrier routing choices.
Review Timeline
Plans and pricing for Montserrat were last verified in May 2026. All 6 plans confirmed active on FLOW's 4G LTE network. Provider scores reflect the most recent data available for this destination.
Montserrat rankings update on a quarterly cycle. Plan pricing is checked monthly against provider websites. Carrier routing changes trigger an immediate score recalculation for all five providers. Network changes in FLOW's Montserrat infrastructure are tracked through industry sources.
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