THE ISSUE: I'm unable to take an unlocked A1661 iPhone 7 Plus to Verizon. It was originally on Sprint. However it's been unlocked (I stuck a T-Mobile SIM card in it to verify). It's also paid off. Verizon's BYOD states it's 'not compatible.' Their people say it 'lacks a frequency' used on Verizon. The latter explanation doesn't hold water with me. Both Sprint and Verizon sell the model A1661 iPhone Plus. It's simply a matter of whether it's locked to their network or not. Verizon's are unlocked out of the box. Sprint's are locked but I've since had it unlocked s-- so technically shouldn't the phone now be the same? Also, it's not black-listed and is 'clear' according to SWAPPA's ESN check. Is it a matter of whether it's "white" listed in the Verizon system? And if so, is there any chance of getting it 'white' listed? And how? Thanks for helping me understand!