If I have a iPhone from cspire can I use it with AT&T?

If I have a iPhone from cspire can I use it with AT&T?

Only if the phone is unlocked.

Can't tell for sure… It appears they are an CDMA carrier though, so no, or at least not fully. The voice part may work, but the data part won't.

Unless cspire is actually a GSM carrier, in which case it will, mostly, work.

It would have to be an unlocked GSM model to have any chance regardless.

How do I get it unlocked from cspire?