I have a sprint iPhone 4 CDMA (No sim card slot) that was gifted to me by my dad. He got it front a friend that is no deceased. The problem I'm having is theres still service on the phone like I can call and text people. My dads friend had an unpaid bill of like $500 if thats gonna cause any problems. How do I completely wipe the phone of cell service so I can use it?
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