"Why is my phone frozen?"に関する回答As I remember... to force the iPhone to restart, you need to hold the start and the home button pressed for about 10 sec.
"Is a 3GS battery compatible with a 3G"に関する回答I replaced an accu for 3gs to my 3g. It doesn't work properly. It last only for one day. And the charge shows 100% in allready 20 min.