The Verizon4S is GSM capable outside the US if unlocked by Verizon... and allegedly, Gevey sims and similar products will unlock a Verizon 4S for domestic GSM use.Can't. Verizon is CDMA and AT&T is GSM
Help me
Yes a Verizon iPhone 4S will work with AT&T or any US GSM provider with a GEVEY. The only downfall is it will not work on iOS6 unless it's 6.1.3, but the phone has to be JB'd and there is no untethered JB for 6.1.3. If the 4S is on iOS 5 upto 5.1.1 it will support it and will work with a GSM carrier. I know because I set one up on iOS 5.0.1.