Model : All SonyEricsson
1 - Switch ON your phone without SIM Card,
2 - Press the left arrow 1 time,
3 - Press the button * 2 times ,
4 - Press the left arrow 1 time,
5 - The message "Personalize with MNC2" will appear,
6 - You can now enter the Unlock Code we sent to you.
If your phone have a "JOGDIAL" (ex : SonyEricsson K700i) you must press
"down arrow" instead of "left arrow" for step 2 &
4. We mean by "Down
Arrow" to direct the Jogdial down!
If you do not get the unlock menu then try repeating the process but
this time with an unaccepted sim card.
Note: To find out the lock status of your handset type the following
without a sim in the phone <- * * <-
<- = left on the jogdial