Used Phone Buying Checklist: What to Check Before You Pay

Start by confirming the exact brand, model, storage capacity, colour and condition being offered. Compare the phone's displayed device information with the seller's description and receipt where available.

Check the IMEI or serial number through the manufacturer's official verification channel when one is available. A valid identifier does not prove that every component is original, but it helps confirm that the device identity matches what you were told.

Use the phone for a few minutes instead of relying on a quick power-on test. Look across the full display for dead areas, unusual colour patches, flicker, touch problems or lines. Test both front and rear cameras, focus, flash, speakers, microphones, vibration and physical buttons.

Connect a known-good charger and cable. If possible, test Wi-Fi, Bluetooth, mobile network, SIM detection and biometric features such as fingerprint or Face ID where supported.

Battery-health information can be useful where the operating system exposes it, but it should not be the only test. Watch for rapid percentage drops, unexpected shutdowns, swelling, excessive heat or charging behaviour that looks abnormal.

Ask whether the phone has been opened or repaired before. Replacement screens, batteries, charging ports and other parts can work well, but the quality of replacement parts varies. The seller should describe known repairs honestly so you can price the device appropriately.

The previous owner's Apple, Google or manufacturer account should be removed using the normal supported sign-out process before you complete the purchase. Do not buy a device that remains activation-locked or whose ownership cannot be reasonably verified.

Where the circumstances feel suspicious, the price is unusually low, or the seller cannot explain the device history, it is safer to walk away than to inherit an ownership or account problem later.