Is roaming free in St. Kitts & Nevis with my US, UK, or EU SIM card, or is an EastESIM a more cost-effective choice?

It's a common misunderstanding, but St. Kitts and Nevis is an independent sovereign nation and is not included in standard US, UK, or EU domestic roaming plans. Relying on your home carrier like AT&T, Verizon, T-Mobile, or UK networks like O2 will almost certainly result in expensive international roaming fees. An EastESIM provides a transparent, affordable, and hassle-free way to stay connected across both islands, giving you peace of mind and predictable costs.