Please find out with your carrier if a 3G phone can be used in their network. Once unlocked (these are locked and we can't unlock them here at our shop. Maybe you can find someone in your area) It will work without problems in Mexico and most Central and South America countries. If you already have a 3G activated SIM card, it will work for sure, as it work with my 2G, 3G SIM that I use to test them making a call.