OK. Owning a phone should not be this difficult. So I bought an iPhone, having t-Mobile as a carrier, I unlocked it. Now this whole mess of updates and and re-locking, etc. is giving me a headache. I'm trying to decide whether just to ditch TMO & sign up with AT&T. The 2 plans are not that far apart. In fact the AT&T plan seems better. So how do I switch to AT&T now? Do a restore, pop in the AT&T SIM and activate? any insight?