I purchased a subsidized AT&T iPhone 4s in October 2011 (model MC922LL/A). I just unlocked the phone through AT&T's unlock website and received an email confirmation. I have backed up and restored the phone in iTunes and received the "Congratulations, your iPhone has been unlocked" message.
My question is, can I use my unlocked iPhone 4s with any of the following carriers:
- T-Mobile (GSM)
- Metro PCS (GSM)
- Verizon (CDMA)
- Straight Talk (CDMA)
Edit: I ended up trying Metro PCS and haven't had any problems. They're using T-Mobile's signal, which works with my 4s.