Defy in a reboot loop

[moejaz]

Hey People,

Need some help here please.
My Defy keeps restarting a few minutes after I have entered the PIN for my Sim
I haven't rooted it or anything.....

I've had this problem since about 11 this morning, I havent downloaded / installed any apps since last night.....

I have done a factory reset via settings and also a hard reset (turning phone on and holding down the volume button)

Any ideas on what I can do??

Please bare in mind, I'm no good when it comes to technical stuff.....

Thanks in advance