Hi
I got IPhone 4S arnd two weeks back. And i updated the IOS from 5.0 to 5.0.1 immediately after. I am also having the same problem. The main issues that I am facing are :
1. not able to see the gps co ordinates on compass.
2. Not able to find my current location on maps - error : Cannot determine location
3. My facebook app, is not able to Check-in with my current location.
After some troubleshooting, i found out that non of these services are showing the gray icon next to the in Settings ---->Location Services ----> Compass and Maps.
Also, scrolling below, to System services, I am not able to see any icon, i.e. purple or gray in any of the service.
Hope someone can present the solution to that.
Thanks
Hitesh