Nokia 2600 - Manual (Page 19)

Keypad lock (keyguard)
To prevent accidental keypresses, select Menu, and press
* within 3.5 seconds to lock the keypad.
To unlock the keypad, select Unlock, and press * within 1.5
seconds. If Security keyguard is on, enter the security
code when requested.
To set the keypad to lock automatically after a preset time
delay when the phone is in the standby mode, select
Menu > Settings > Phone > Automatic keyguard >
On.
To answer a call when the keypad is locked, press the call
key. When you end or reject the call, the keypad
automatically locks.
When the device or keypad is locked, calls may be possible
to the official emergency number programmed into your
device.
Functions without a SIM card
Some functions of your phone may be used without
installing a SIM card, such as the radio, games, and data
transfer with a compatible PC or another compatible
device. Some functions appear dimmed in the menus and
cannot be used.
© 2007 Nokia. All rights reserved. 18