Motorola T720 User Manual page 45

If you forget your unlock code, try entering 1234 or the last
four digits of your phone number. If that does not work, do
the following at the
Press
M
1
2 keypad keys
+
OK
3 ( )
Enter Unlock Code
To
go to the unlock code bypass
screen
enter your security code
submit your security code
prompt:
43