● Lock code (also known as security code) — This code(5 digits) can be used to lock the device to avoidunauthorised use. The factory setting for the lockcode is 12345. To avoid unauthorised use of yourdevice, change the lock code. Keep the new codesecret and in a safe place separate from your device.Try entering the code only once, if you forget thecode. If the code you entered is not correct, contacta Nokia Care point or your service provider forfurther instructions.● Personal unblocking key (PUK) code and PUK2code — These codes (8 digits) are required tochange a blocked PIN code or PIN2 code,respectively. If the codes are not supplied with theSIM card, contact the operator whose SIM card is inyour device.● UPUK code — This code (8 digits) is required tochange a blocked UPIN code. If the code is notsupplied with the USIM card, contact the operatorwhose USIM card is in your device.Prolong battery lifeMany features in your device increase the demand onbattery power and reduce the battery life time. To savebattery power, note the following:● Features that use Bluetooth technology, or allowingsuch features to run in the background while usingother features, increase the demand on batterypower. To prolong the operating time of yourdevice, turn the Bluetooth technology off when youdo not need it.● Features that use wireless LAN (WLAN), or allowingsuch features to run in the background while usingother features, increase the demand on batterypower. WLAN on your Nokia device switches offwhen you are not trying to connect, not connectedto another access point, or not scanning foravailable networks. To further reduce batteryconsumption, you can specify that your device doesnot scan, or scans less often, for available networksin the background. WLAN switches off in betweenbackground scans. See "Wireless LAN", p. 36.When Scan for networks is set to Never, the WLANavailability icon is not shown in the standby mode.However, you can still manually scan for availableWLAN networks and connect to WLAN networks asusual.● If you have set Packet data connection to Whenavailable in connection settings, and there is nopacket data coverage (GPRS), the device periodicallytries to establish a packet data connection, whichcauses increased demand on battery power. ToUseful information© 2008 Nokia. All rights reserved.18
