Info-Mac

is anyone having the same problem? I nocited that my new iPhone 4 was turning off a couple of times during the day at first i though it was just getting the sleeping mode but not it wasn't because I was fortsed to restart it.
PLEASE HELP ME!!!

I have had this but only when running apps I downloaded. It has happened with Facebook chat I'm still checking which others. Have you got the latest update on the iPhone software 4.02 is out?