How to enter an unlocking code to Ericsson phones

Model : All Ericsson

1 - Switch ON your phone without a SIM card inserted
2 - Press 1 time the left arrow
3 - Press 2 times the button *
4 - Press 1 time the left arrow
5 - The message "Personalize with MNC2" will appear
6 - You can now enter the unlock code we sent to you and press OK
7 - Your phone is now unlocked