Is roaming in Barbados automatically included with my US (e.g., AT&T, T-Mobile) or UK/Canada home SIM card?

It is crucial to understand that Barbados operates as an independent nation, separate from common US, UK, or EU domestic plans. Your home carrier, such as AT&T, Verizon, T-Mobile, or Vodafone UK, will almost certainly impose substantial international roaming fees. These often manifest as expensive daily passes or per-MB charges that can quickly accumulate. Opting for a WestESIM avoids these prohibitive costs, providing predictable and affordable high-speed data.