Actually, Verizon has never locked the CDMA portion of their handsets. Ever. They have always been sold CDMA unlocked. Verizon and Sprint phones are interchangable, the carriers in the US just choose to not allow activation of the others' phones in most cases. Sprint has always MSL-locked their handsets, however you can get the MSL from Sprint and remove the lock. It's just a matter of if the other carrier will support activation of the equipment. Same with the international carrier but the situation gets more sketchy with iPhone 5 due to the fact LTE/CDMA handsets act a bit different from legacy CDMA devices.