I got messages from WhatsApp about the already hacked number of a friend, I would like to help him urgently and send a 6-digit code, which I would have received by SMS. There was an official SMS from WhatsApp, with the "code to verify your phone".
After forwarding I was rausgekickt with my Huawei P10 → jmd has registered a new device. I'm an idiot. Old account is partly still online. Phone number changed at Telekom.
What to do to either get the access right again or if it's impossible to disable the old account?
So first you hit your head 3 times against the wall. Then write to whatsapp support.
This someone can only be your "friend". You have changed your mobile number, as you wrote.
If your data is still backed up, uninstall your WA, reinstall it, and verify it with a new code. There should be a query that a backup was found and whether it should be restored.
This is the same process as moving the data to a new / different phone.
https://www.futurezone.de/digital-life/article214160317/Gewusst-wie-WhatsApp-Daten-uebertragen-ist-ganz-einfach.html
This should have your problem done.
And look up, in the choice of friends. )
From your answer, I gather that you have experienced the wall more often.
