Nokia 6788 User Manual

Access codesIf you forget any of the access codes, contact your serviceprovider.Personal identification number (PIN) code — This codeprotects your SIM card against unauthorised use. The PINcode (4 - 8 digits) is usually supplied with the SIM card.After three consecutive incorrect PIN code entries, thecode is blocked, and you need the PUK code to unblock it.UPIN code — This code may be supplied with the USIMcard. The USIM card is an enhanced version of the SIM cardand is supported by 3G mobile phones.PIN2 code — This code (4 - 8 digits) is supplied with someSIM cards, and is required to access some functions in yourdevice.Lock code (also known as security code) — The lock codehelps you to protect your device against unauthorised use.The preset code is 12345. You can create and change thecode, and set the device to request the code. Keep the newcode secret and in a safe place separate from your device.If you forget the code and your device is locked, yourdevice will require service. Additional charges may apply,and all the personal data in your device may be deleted.For more information, contact a Nokia Care point or yourdevice dealer.Personal Unblocking Key (PUK) code and PUK2code — These codes (8 digits) are required to change ablocked PIN code or PIN2 code, respectively. If the codesare not supplied with the SIM card, contact the networkservice provider whose SIM card is in your device.UPUK code — This code (8 digits) is required to change ablocked UPIN code. If the code is not supplied with theUSIM card, contact the network service provider whoseUSIM 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. Turn Bluetooth technology off when you donot need it.• 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. To prolongthe operating time of your device, select Packet dataconnection > When needed.• If the signal strength of the cellular network variesmuch in your area, your device must scan for theavailable network repeatedly. This increases thedemand on battery power.If the network mode is set to dual mode in the networksettings, the device searches for the 3G network. Toonly use the GSM network, press , and selectTools > Settings > Phone > Network > Networkmode > GSM.17 Find help© 2009 Nokia. All rights reserved.