Some users have been reporting that their A-GPS doesn’t always work. The forums of Apple are steadily increasing with complaints regarding the non-functioning of the iPhone 3G GPS. Some users have been testing and came to the following conclusions:

* 3G: Off
* BT: Off
* Wifi: On
* Does GPS work?: Yes

——

* 3G: Off
* BT: On (and paired w/ headset)
* Wifi: On
* Does GPS work?: Yes

——

* 3G: On
* BT: Off
* Wifi: Off
* Does GPS work?: NO

——

* 3G: On
* BT: On (and paired w/ headset)
* Wifi: off
* Does GPS work?: NO

——

* 3G: On
* BT: On (and paired w/ headset)
* Wifi: ON
* Does GPS work?: NO

The answer is simple, do you want to use your GPS? Kill the 3G first and then reactivate it. This will solve your GPS problems.