Warning: Do not enter any wrong unlock unlock codes on your Samsung D428 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 Samsung D428 with a
NOT ACCEPTED SIM Card.
2 - Compose :
#7465625*638*CODE# (or
*#7465625*638*CODE#).
NOT ACCEPTED: We mean, to use a sim card from a network other than the network your Samsung D428 is locked to.
CODE: Its the unique Unlock Code for your Samsung D428.
Each Samsung D428 mobile phone has an unique unlock code. You can buy the unique unlock code for your Samsung D428 mobile phone at www.mobileunlocksolutions.com.