Last week I was given an iphone 5c from Sprint. I called Sprint to unlock it. They asked for the old owners phone number and account number. All I had was the phone number, but the did unlock it. It took about 2 days after the call for it to unlock. I then inserted my iphone 5 SIM card from Verizon in the unlocked Sprint iphone 5c. It is working perfectly. I did not even have to contact Verizon.