Originally Posted by
Non-NonRev
TWA884 - are the dual-mode phones locked to the provided "roaming" SIM, or can the owner swap SIMS at will?
The McWorld article I linked above discusses that issue.
AT&T iPhones are locked to the micro-SIM card in the slot. Sprint iPhones are unlocked. Verizon will provide an “international unlock” upon request to customers who have been in good standing for 60 days.