Turning The Radio On And Off - Blackberry RIM 850 Installation And User Manual

Get to know your handheld — Turning the radio on and off
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Turning off the handheld
In the Home screen, scroll to the POWER OFF icon and click.

Turning the radio on and off

When you first receive your handheld, the wireless radio will be
turned off, and the handheld cannot communicate over the
network. You must turn on the radio before you can send and
receive messages.
In the Home screen, scroll to the TURN WIRELESS ON icon
and click.
You will notice that the TURN WIRELESS ON icon was an
antenna, but when you select the icon, the function name changes to
TURN WIRELESS OFF and the icon changes to an airplane. The
airplane icon is a reminder to turn off your handheld's radio when
on an airplane, in a hospital, or any place where it may interfere
Installation and User's Guide