今天早上刷完机以后，发现iPhone 3G的GPS不工作了，不管用什么软件都定位不了。在国外的论坛找到了fix的办法，非常有效，转过来：
- Go to settings, general, auto-lock, change it from 1 Minute to NEVER
- Go to settings, general, reset, reset network settings (THIS WILL REBOOT YOUR IPHONE)
- Go outside, in a clear place with NO tree’s, buildings, or anything blocking your view of the sky
- Open “MAPS”, click NO on all that wi-fi crap, then click the little gps icon, and let it sync up with the satellites (this could take a few minutes)