Warning: Do not enter any wrong unlock unlock codes on your Ericsson R300z 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 Ericsson R300z
without any SIM Card,
2 - Press the
left arrow key/button
once,
3 - Press the
button * twice,
4 - Press the
left arrow key/button
once,
5 - The message "Personalize with MNC2" will appear, (or you will have displayed an unlock menu, select the lock you want to unlock)
6 - Enter the Unlock Code and press OK.
7 - Your phone is now unlocked.
Each Ericsson R300z mobile phone has an unique unlock code. You can buy the unique unlock code for your Ericsson R300z mobile phone at www.mobileunlocksolutions.com.