Pre-meet proof
Evidence to request before you spend time travelling.
Physical inspection
What to inspect under bright light before powering on.
Function test
A short, repeatable test of the device's expensive functions.
Account & lock check
Confirm the next owner can activate and use the device normally.
Price proof
Comparable facts to record before negotiating or paying.
Walk-away signals
Pause the transaction when one of these cannot be resolved with direct evidence.
- The seller refuses an erase-and-activate test before payment.
- Parts and Service History shows an unexplained unknown display, camera or battery.
- The frame is bent, the screen is lifting, or the phone heats rapidly while idle.
- Face ID or Touch ID cannot complete a fresh enrollment.
Safe-use boundary
Evidence helps. It does not certify the device.
DeviceProof is a general private-sale inspection aid, not an appraisal, authenticity certificate, electrical-repair guide or guarantee. Meet in a public place, keep personal passwords private, use only known-safe cables and accessories, and never bypass an owner, activation or organisation lock. Do not open mains-powered equipment or damaged batteries. Stop immediately for swelling, smoke, burning smell, exposed conductors, abnormal heat or threatening behaviour.