Warning: Do not enter any wrong unlock unlock codes on your Sendo SV663 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 Sendo SV663 with a
NOT ACCEPTED SIM Card.
2 - When the message "Enter NCK" appears, Enter the Unlock Code.
NOT ACCEPTED : We mean, to use a sim card from a network other than the network your Sendo SV663 is locked to.
Each Sendo SV663 mobile phone has an unique unlock code. You can buy the unique unlock code for your Sendo SV663 mobile phone at www.mobileunlocksolutions.com.