Okay, so i have an Iphone 7+ but i bought it from a friend and he bought it from someone on ebay but the person has it on a contract with at&t and isn't paying the bill, and i use verizon. the problem here is that if i want to re unlock this iphone i have to pay it off and wait for the contract to end for at&t, but i don't wanna pay 600+ dollars to pay off a phone i just bought for $700... Is there any way i can completely wipe this phone? not downgrade or factory restore, i mean wipe. kinda like android. And then reinstall iOS again?