Used phones: Check for the previous owner's lock before you pay

[Redaktion]

A used smartphone can stay linked to the previous owner's accounts even after a factory reset. Activation Lock, Factory Reset Protection or company device management then make it unusable. Here's how to check an iPhone, Android or Samsung phone before you pay.

https://www.notebookcheck.net/Used-phones-Check-for-the-previous-owner-s-lock-before-you-pay.1421022.0.html

[N.]

this advice is NONSENSE, as 99.9% of purchases are made ONLINE, so you pay BEFORE you check. You can ASK the seller and they MIGHT run those tests for you - or not.