Alarm going off cannot remember pin

I moved from Thailand to UK and bought a new sim today. Putting in the new sim set the alarm off. I cannot remember the pin on the phone. I tried deleting the phone from my account in the portal but when I put the battery back in the phone the alarm still goes off. What can I do?

Mgmids welcome to Avast! Forums.

I think you will get a better answer in the Mobile security forum here:
http://forum.avast.com/index.php?board=37.0

This section of the forum is for PC.

Good luck.