nokia N96 reset problem?

[BILALB]

hello i have just got a nokia n96 i have had it for 3days and it has started to turn its self off when ever i try to use the inter net or play songs.
i took it to an o2 shop and they said reset the phone so i tryed when i got home and it is asking me for a code.
does anyone know where i can get it from or what it could be.

thanks alot

 

[MRK1]

it's usually default 1234 but check with O2

 

[JoeC]

I did it with my n95 and it was 12345