E51 User Guide - Nokia
E51 User Guide - Nokia
E51 User Guide - Nokia
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You can switch the device on with no SIM card inserted, in<br />
which case the device starts up in the offline mode, and you<br />
cannot use the network-dependent phone functions.<br />
To switch the device off, press and hold the power key.<br />
Lock the keys<br />
When the device or keypad is locked, calls may be possible to<br />
the official emergency number programmed into your<br />
device.<br />
The keypad of your device locks automatically to prevent the<br />
keys from being accidentally pressed. To change the period<br />
after which the keypad is locked, select Menu > Tools ><br />
Settings > General > Security > Phone and SIM card ><br />
Keypad autolock period.<br />
To lock the keys manually in the standby mode, press the left<br />
selection key and *.<br />
To unlock the keys, press the left<br />
selection key and *.<br />
Tip: To lock the keys in the<br />
menu or in an open<br />
application, press the power<br />
key briefly, and select Lock<br />
keypad. To unlock, press<br />
the left selection key and *.<br />
Display indicators<br />
The device is being used in a GSM network (network<br />
service). The bar next to the icon indicates the signal strength<br />
of the network at your current location. The higher the bar,<br />
the stronger the signal.<br />
The device is being used in a UMTS network (network<br />
service).<br />
The battery charge level. The higher the bar, the stronger<br />
the charge in the battery.<br />
© 2007 <strong>Nokia</strong>. All rights reserved. 17
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