Apple took my iPhone 6 in to investigate why it could not obtain a cellular signal on AT&T. They had it a week and replaced it with a "new" phone. I upgraded to the 6S+ and am now trying to sell the replacement 6. Out of curiosity, I borrowed my friend's Verizon SIM card and sure enough the phone worked to make calls and texts from his phone number. Did I luck out and get an unlocked iPhone? I want to ensure I accurately list the item.
Thanks
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