It depends on your usage and budget. Can’t go past a BlackBerry if you can afford one. I use my constantly, for an old guy I do more texting and emailing than most kids. Than most younger guys anyway, teenage girls are born with calloused fingers. Unlocking a phone isn’t hard and once unlocked it will have all the features available to the model and carrier. The plan is as important as the phone in many ways. The BlackBerrys have the advantage of not using extra data for browsing, emailing, texting or IM messaging. Some of the other smartphones can bankrupt you. (iPhones.)