From the Motorola manual:
Your phone's four digit unlock code is originally set to 124 and the six digit security code is initally set to 000000 . .
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 when you see the ENTER UNLOCK CODE message"
Press =
enter your security code [NOT YOUR UNLOCK CODE]
OK