Warning: Do not enter any wrong unlock unlock codes on your Philips 680 mobile phones. If you enter over a certain amount of wrong unlock codes on your mobile phone, your phone may get hard locked and sometimes become unusable.1 - Switch ON your Philips 680 with a
NOT ACCEPTED SIM Card.
2 - Philips 680 will then display "Enter NCK".
3 - Enter the Unlock Code.
NOT ACCEPTED: We mean, to use a sim card from a network other than the network your Philips 680 is locked to.
Each Philips 680 mobile phone has an unique unlock code. You can buy the unique unlock code for your Philips 680 mobile phone at www.mobileunlocksolutions.com.