WonderConnect does not provide an unlimited‑data eSIM for Montserrat. The provider’s offerings for this destination are fixed data plans with set allowances and a 30‑day validity. Among the available options, a 20GB plan costs $53.99 USD, a 10GB plan costs $34.99 USD, and a 5GB plan costs $25.99 USD. These fixed bundles can be a more cost‑effective choice unless a traveler requires very high data usage, in which case a larger fixed plan or exploring other providers might be preferable.