Sprint PCS Connection Card PC-5740 Product Manual page 55

To change your lock code, access the Settings window.
Select Menu>Settings>PCS Vision and click Change Lock
Code. Enter your new lock code in the first field and
confirm it by re-entering it into the second field.
Note:
Running the Activation Wizard resets the lock code to the last four
digits of the most recently activated phone number.
Select a lock status: UnLock to leave the Sprint PCS
Connection Card unlocked, Lock Now to enable the lock
code feature immediately, and Lock On Power Up to
enable the lock code feature the next time the card
powers up.
Click OK to save changes and close the Settings
dialog box.
Note:
The Sprint PCS Connection Manager Software interface will allow
you to place outgoing calls to emergency numbers, even if the Sprint PCS
Connection Card is locked.
Section 2A: Sprint PCS Connection Manager Software 47