Nokia 2720 - Manual (Page 15)

Answer a call when the keypad is locked
Press the call key. When you end or reject the call, the
keypad locks automatically.
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
inserting a SIM card, such as Organiser functions and
games. Some functions appear dimmed in the menus and
cannot be used.
Applications running in background
Leaving applications running in the background increases
the demand on battery power and reduces the battery life.
General information
About your device
The wireless device described in this guide is approved for
use on the EGSM 900 and 1800 MHz networks. Contact your
service provider for more information about networks.
General information 15
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