If your issue remains unsolved, contact Nokia for repair options. Go to www.nokia-asia.com/repair. Before sending your device for repair, always back up your device data.Access codesPIN code — This code protects your SIM card against unauthorised use. The PIN codePIN2 code — This code (4 - 8 digits) is supplied with some SIM cards, and is required toaccess some functions in your device.If you forget an access code, contact the network service provider whose SIM card is inyour device. After three consecutive incorrect PIN or PIN2 code entries, the code isblocked, and you need the PUK or PUK2 code to unblock it.PUK code and PUK2 code — These codes (8 digits) are required to change a blocked PINcode or PIN2 code, respectively. If the codes are not supplied with the SIM card, contactthe network service provider whose SIM card is in your device.IMEI number — This number (15 digits) is used to identify valid devices in the GSMnetwork. Devices that are, for example, stolen, can be blocked from accessing thenetwork. To view the IMEI number for your device, in the home screen, enter *#06#.Lock code (also known as security code) — The lock code helps you to protect your deviceagainst unauthorised use. You can create and change the code, and set the device torequest the code. Keep the new code secret and in a safe place separate from yourdevice. If you forget the code and your device is locked, your device 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 Centre or your device dealer.TroubleshootingIf your device stops respondingReboot your device. Press and hold for about 8 seconds. The device vibrates threetimes and switches off. To switch your device on again, press .No content, such as contacts or messages, is deleted.Restore original settingsIf your device is not working properly, you can reset some settings to their originalvalues.1 End all active calls and connections.2 Select Menu > Settings and Phone > Phone management > Factorysettings > Restore.3 Enter the lock code.114 Access codes(4 - 8 digits) is usually supplied with the SIM card.