S7 restarts itself, failed to download attachment from multimedia message

[AC Question]

Hi, suddenly my brand new S7 restarted itself and did a factory reset. now I cannot get further in setup than trying to write the pwd of my gmail account. I get this message: failed to download attachment from multimedia message. Plus the pwd is not valid.

Pwd of email account is reset and working.

What to do? I've to use my gmail account since this is a factory reset and it says I have to use the owners account (which is my mine).

Heeeeelp!

 

[the tall guy]

Hi, where did you buy the phone from? the phone shouldn't perform a reset on it's own unless you did it or it was accessed remotely (reported stolen)