Quad band required for most of Carribean, my T-mobile was fine it picked up local networks digicell ect, but when your at sea you can connect via ships signal (not cheap i think it was £2 a minute) phone your provider and block incoming messages and voicemail, otherwise you will be charged for receiving texts and picking up voivcemail. also the cheapest way to keep in touch abroad is picture messaging, we were on The Sea Princess this November and i was charged 20pence per message, just take photo's on phone and add text.
You definitely need a Tri Band & I'm pretty sure in some parts of the Caribbean you will need a Quad Band. Most modern phones are now Quad on a descent upgrade deal......Regards Wilba .
Quad band is vital for some islands.
I have just been on Oriana with a four band mobile phone and Orange. No use at all in spite of a phone call to providers. No trouble with o2.Dorothy Hettle.