回答“Why is my phone frozen?”As I remember... to force the iPhone to restart, you need to hold the start and the home button pressed for about 10 sec.
回答“Is a 3GS battery compatible with a 3G”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.