Warning: Do not enter any wrong unlock unlock codes on your Philips S660 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 S660 with a
NOT ACCEPTED SIM Card.
2 - Philips S660 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 S660 is locked to.
Each Philips S660 mobile phone has an unique unlock code. You can buy the unique unlock code for your Philips S660 mobile phone at www.mobileunlocksolutions.com.