Novatel Merlin S620 User Manual page 44

To enable the lock feature:
1.
Click the Locked/Unlocked Icon located in Detail Drawer of the
Sprint PCS Connection Manager interface.
2.
The Enter User Lock Code window appears.
3.
Enter your lock code and click OK.
Tip:
Your default lock code is the last four digits of your Sprint PCS Connection
Card's phone number. If you can't recall your card's phone number, go to
Menu>Device Info and Diagnostics or call Sprint Customer Service at
1-888-211-4PCS (4727).
2C: Menu Options 39