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After the update to Nokia Belle, my phone asks me to enter a new security code. I do this and get an error message stating "code error". What should I do?

You have to enter your existing lock code to your phone when asked after the update to Nokia Belle. Be sure to do this only after Nokia Suite states that the update has been successfully performed. The lock code is requested after the update only if you have defined it earlier by locking your phone. If you fail to enter your existing lock code, an error message "code error" is show. You will be able to use the phone even if a wrong code is entered, but your phone will continue to ask for the lock code every time you start your phone. Your phone will also prevent you from performing secure operations, such as locking your phone manually or restoring factory settings, until the correct code has been entered once.

In some situations your phone may repeatedly ask you to enter the security code. If this happens, then please try to enter your existing security code a few times until the phone stops asking for it. If you enter a wrong code too many times, your phone will ignore any entered codes for some period of time. In this situation, please wait for some minutes and then try again. If you are unable to continue, you may also turn off the phone by pressing your phone’s power button for about 10 seconds, then wait for 5 minutes or more and then start the phone again. If you don’t remember your existing lock code or your phone does not accept it even after multiple tries, please visit your local Nokia Carepoint (locations are visible via www.nokia.com/support).

http://europe.nokia.com/find-product...lle-update-faq