: This is the most critical check. Ensure the previous owner has turned off Find My , otherwise, the phone will be "Locked to Owner" and completely unusable for you.
: Use the built-in guide at Apple Support to safely back up your data, sign out of iCloud, and erase all settings before handing over the device. iphone buy and sell
If you are trying to impress a buyer or test a new purchase, try these unique features: If you want to buy a preowned iPhone - Apple Support : This is the most critical check
: Check the maximum capacity in Settings > Battery > Battery Health . Ideally, a used phone should be above 80% to ensure it can still hold a reliable charge. Key Selling Features sign out of iCloud