Hi, I bought a jailbroken iPhone 5 from someone, then when I went to go activate it, the Best Buy employee said that the phone was either reported lost/stolen, or the number had not been deactivated. Called seller, and asked if he deactivated it, and he said he forgot but would do it when the Sprint helpline opens, tomorrow morning. Apparently he switched from Sprint to T-Mobile sometime in the last few weeks, and changed numbers as well for some reason. It does still have his Facebook signed in, and what must be his old number listed in the phone settings. My question is, since I am already in possession of the phone, will he be able to remotely deactivate the phone? Or would he have to take the phone into the store? I have no phone(broken, why I need a new one) to contact him with, but gave him a friend's number to text when (if) he deactivates it. Do I have anything to worry about? Thanks!