Restarting X8

[#1]

I got an Xperia X8 on 22nd October. The phone is very good to use. Its touch response is perfect. The speed is good. But the phone restarted the first day when I played the demo video. Within 5 days the phone has restarted for about 4 times when I was playing other videos. How to get rid of this problem? Please help me out. Should I go to the showroom and ask for a new handset?

[sushidushi]

If you can get back to the shop, yes, I would certainly go back and ask them about your problem.  It shouldn't restart when you try to play a video.

[#3]

You should go and test the new one still in the store... We never know when the problem might have affected more than one phone...