Use this method if the phone turns on and you remember the lock code (default is usually 0000 or 1234).
To perform a hard reset on a Kyocera X3 , the standard method involves using a physical button combination to enter Recovery Mode How to Hard Reset KYOCERA X3
After the reset completes, you will return to the recovery menu. Scroll to Wipe cache partition and select it. This removes temporary files that could cause instability. Use this method if the phone turns on
With the phone powered off and closed (flip shut): How to Hard Reset KYOCERA X3