Your iPhone's compass is a feature you may not know about, but it can save your life. However, you'll need to calibrate it ...

Open Control Panel > Hardware & Sound > Tablet PC Settings > Calibrate the screen for pen or touch input. Press the Rest button. If the Reset button is grayed out, it means that your settings are ...

To calibrate your gun, go to the Loadout screen in the main menu, and pick any unlocked weapon. Then, select the Calibrate tab on the list of options at the top of the screen. This opens the ...