I understand that BTL has cellphones that work on the caye. Would my phone from the US work? It is GSM and triband using the T Mobile service. The brochure indicates that there is service in Belize, though is not specific as to which part. I wanted to know if anyone has tried to use their out of country phone there and what that entailed. What band is used, etc. Do I need to buy or rent an additional SIM card? I just need to be reachable while I am there. Thanks for any and all assistance.