02-29-2012, 04:26 PM
As long as it is a phone with a sim card (some carriers like Verizon don't use sim cards) then yes, you can use a digicel sim card in it if it is unlocked. I believe it also needs to be on the GSM network but not positive on that one.
Unlocking a phone means that it is free from being tied to one carrier and can be used with other carrier sim cards.
If it's an Iphone, the other common practice is "jailbreaking" which means that you can download apps from places other than the istore.