Ask if the screen, battery, or cameras have been replaced and if genuine Apple parts were used.
Before meeting or purchasing, ask these foundational questions to screen for potential "red flags": what to ask when buying a used iphone
If you are meeting in person, perform these physical and software checks: Steps after buying a used iPhone - Apple Stack Exchange Ask if the screen, battery, or cameras have
Ask the seller to confirm they have signed out of iCloud and turned off "Find My iPhone". An iCloud-locked device is unusable without the original owner's credentials. Ask if the screen
Ask for the "Maximum Capacity" found in Settings > Battery > Battery Health . A percentage below 80% generally indicates the battery will need replacement soon.