Being Tricky
The short answer
To check used phone before buying, meet in person, in good light, with the phone switched on.
At a glance
About 15 minutes · Medium · For Android
Key point 1 of 5
Every phone has an IMEI, a unique number that carriers use to identify it.
Key point 2 of 5
Android has a feature called Factory Reset Protection.
Key point 3 of 5
Screen: open our dead pixel test in the phone’s browser and go full screen.
Key point 4 of 5
If you can, put your own SIM card in and make a call.
Key point 5 of 5
Galaxy phones have built-in tests that cover a lot of this checklist.
Quick tip
Never accept a phone stuck on a “verify your account” screen with a promise that the seller will unlock it later.
Watch out
If the IMEI comes back as reported lost or stolen, don’t buy the phone, even at a big discount.
You might ask
How do I know if a used phone is stolen? Get the IMEI from Settings → About phone and make sure it matches the box.
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Being Tricky