Kyocera QCP 6035 Reference Manual page 227

4. Tap the Unassigned box next to Password. The Password dialog appears.
5. On the line, enter the password you want to use and tap OK. A password can
contain any combination of numbers and letters.
6. Enter the password again to verify it. Tap OK.
7. Tap Lock & TurnOff.
8. To lock the phone, tap Off & Lock.
The screen becomes blank. The phone is now locked.
Enter your password here.
The word Assigned now appears in the Password
box.
Tap here.