Buying a used iPhone: a checklist against nasty surprises
· TR Vertriebs GmbH
What to watch for when buying a used iPhone: iCloud lock, blacklist, battery and authenticity – the complete pre-purchase checklist.
A used iPhone is a smart way to save a lot of money – but only if the device is clean. Buying in a rush risks getting a locked, stolen or counterfeit device. This checklist walks you through, step by step, whether an offer is really legitimate.
Before buying, ask for the IMEI or serial number and check it online. Two things are decisive: is the device on the blacklist (reported stolen or lost)? And is the iCloud Activation Lock still active? Both can be clarified in seconds via an IMEI check – before you even meet the seller.
Verify authenticity and the exact model. Using the serial number you can confirm whether the advertised model, storage and colour really match. That reveals if a regular iPhone has become a 'Pro Max' in the listing, or if a clone is being sold.
Check the battery health. Under Settings → Battery → Battery Health you can see the maximum capacity in percent. Values below 80% mean the battery should be replaced soon – a legitimate negotiating point. Also note whether the battery is original or already replaced.
Do a function test on the spot. Check the display (touch in all corners, burn-in, cracks), both cameras, Face ID or Touch ID, speaker, microphone, all buttons and the charging port. Insert a SIM card and test network connectivity – this also reveals a possible SIM lock.
Insist that the seller fully resets the iPhone in front of you and signs out of their iCloud account. Afterwards the device must show the setup welcome screen and must not ask for an unknown Apple ID login. If it still asks for a password, Activation Lock is on – walk away.
Handle payment and receipt properly. Meet in a safe, public place, avoid anonymous instant transfers if possible, and get a receipt with date, IMEI/serial number and the seller's contact details. That protects you if the device causes problems later.
In short: first check the IMEI (blacklist + iCloud), then verify authenticity and model, check the battery, test the functions, demand a reset, and pay cleanly. Follow this order and you'll almost never make a bad used-phone deal.