Blackberry WIRELESS HANDHELDTM 857 - Manual (Page 45)

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Start sending email
Now that you’re more familiar with the handheld, you can start
sending and receiving email! The following steps will help you get
started:
1. Turn on the radio.
2. Register with the wireless network (if necessary).
3. Install the Desktop Software on your PC.
4. Connect the handheld to your PC using the cradle.
5. Send a test message.
6. Read the test message.
Turning the radio on and off
When you receive your handheld, you must first insert it into the
charging cradle and allow it to recharge to full battery power. 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.