Whatsapp & changing number

[Christine_K]

Hi guys

I've noticed the following warning (Whatsapp) :
/Username/'s safety code has been changed.
(but we continued texting as before, no changes and etc.)

Please, explain me, so that means that /Username/ just changed his phone number but uses the same Whatsapp account,
or smth else?

PS:
both that username and me did whatsapp recent update,
and then I saw only standard warning like "now all your messages will be coded...", if that matters.

 

[Christine_K]

is anybody there?

 

[Powermax]

This is probably due to the new end to end encryption feature. The other user changed his device and thus has a new encryption key. WhatsApp notices this and shows this message.

 

[Christine_K]

This is probably due to the new end to end encryption feature. The other user changed his device and thus has a new encryption key. WhatsApp notices this and shows this message.

thank you

so that's just about changing device, yes?

and (sorry for the strange question ) if, for example,
i change my telephone number,
but use the same whatsapp account,
nobody will see my new tel.number?