Are you happy with it? Does the phone function well? I saw a few people switched back b/c of weird issues with the phone. I want to know if this is the minority. I can only use the IPhone 4 if I jailbreak it (I don't live in an AT&T serviced area). So I want to be sure it will be worth it to me to jailbreak it or if I should stick with my tmobile andriod. Tx!