Which carriers will my unlocked AT&T iPhone 4s work with? I purchased a subsidized AT&amp;T iPhone 4s in October 2011 (model MC922LL/A). I just unlocked the phone through AT&amp;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.
You won't be able to use it on any CDMA networks.  T-Mobile is no problem.  Metro PCS has a big "bring your own device" headline on its site so I'd guess it's OK as well.