How Montserrat scored
We evaluated eSIM options for Montserrat using provider plan data and FLOW's network specifications. 2 carrier networks accept eSIM roaming connections in Montserrat: FLOW and Digicel. 6 plans from 5 providers form the basis of our comparison. Pricing starts at $7.47/GB on 4G LTE.
Two carriers operate in Montserrat: FLOW and Digicel. FLOW publishes the wider footprint, and Digicel is the fallback where the primary map thins.
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 from $2.99/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 the rubric scores
The rubric ranked 6 eSIM plans from 5 providers for Montserrat on five dimensions: Coverage (25%), Pricing (25%), Network tier (20%), App features (15%), Support access (15%). Each provider takes a 1-5 mark per dimension, and the weighted total is doubled to give the /10 display score.
Where the inputs come from
Scores for Montserrat use the published weighted formula: Coverage (25%), Pricing (25%), Network tier (20%), App features (15%), and Support access (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 the full scoring rubric.
BesteSIM runs no speed tests and publishes no throughput figure for Montserrat. The network-tier score reads the technology each carrier publishes, which is 4G LTE here.
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 publishes 4G LTE across Montserrat, and every ranked provider attaches to it rather than to a network of its own. 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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