Weird IMEI + How to change it ?

Azuraël

Hi,
I was trying to change my IMEI number (if you know how to do it, please tell me) and I typed *#06*.
SURPRISE MOTHERF***ER

... Help ?  (amazingly the phone works perfectly without any network problem)

EDIT :   I just looked the box of my Super, and the Imei on it is normal, a chinese one, obviously.
I used SP Flash Tool once, but I followed the instructions so this should not be the cause ?