The phone you sold is still signed in to your accounts

[Redaktion]

A new password does not sign out every session, and most providers never say what it actually does. Google keeps showing devices you factory reset, Amazon leaves Kindles signed in, Netflix hides anything idle for 90 days. Where the device lists of Google, Microsoft, Apple, WhatsApp, Netflix, Instagram and Amazon are, and how to clear them in 10 minutes.

https://www.notebookcheck.net/The-phone-you-sold-is-still-signed-in-to-your-accounts.1388632.0.html