Apple will send you a prepaid trade-in kit . You must mail your device within 14 days of receiving your new one.
Bring your device to an Apple Store for an immediate inspection and instant credit. apple buy your iphone
Go to Settings > [Name] and tap Sign Out . Apple will send you a prepaid trade-in kit
Use a paper clip or SIM tool to remove your physical SIM card. The Trade-In Process apple buy your iphone