Some locations may require you to turn off your phone’s wireless connections by placing your phone in Airplane mode.
Press and hold the Power/Lock Key , then
tap Turn on Airplane mode in the Dialog box
that appears.
OR
From the Home screen, tap the Menu Key > System settings > Networks tab
> Airplane mode > OK.
OR
Drag the Status Bar downward, then tap Airplane
mode (in the Quick settings bar at the top of the screen).
Each of these access methods toggle the setting on or off.