I have a pair of iPhone 4s's running v7.1.1 (11D201) that have completed their contract with Verizon, and I'd like to get a new contract with the much cheaper T-Mobile (via Walmart).
I've heard from multiple sources that this is not possible with me manipulating the iPhone myself, or even a Verizon rep, but requires a process known as jailbreaking to remove the hard-coded dependency (imagine me using air quotes) between the iOS and the Verizon carrier.
The Walmart rep said that all that was needed was for Verizon to unlock the phones, but the Verizon rep says that the phones have to be jailbroken.
Can anyone confirm this, and make any recommendations on how to proceed?
Thanks in advance.