|>| Flashing K800i, problem occured |<|

The other day i got help flashing my K800i from here.
I want to thank senter for helping me with that.

Alltho my phone is now up and running there has been a small complication.

My phone sometimes just shutsdown, and i cant figure out why.

I know more about computers so i thought maybe the phone works the same way. So i tried deleting some of my pictures and some of my music and such to make more room available in order for the phone to work better/faster as with the PC hard drives.

Anyone of you got any idea why my phone sometimes decides to switch itself off?
Could it have been a bad flashing or a bad battery
is it a common problem that i should just ignore?

Thanks in advance.