Kyocera DuraForce PRO with Sapphire Shield - Restart in Safe Mode
Safe Mode puts your phone in a diagnostic state (returned to default settings) so you can determine if a third-party app is causing your device to freeze, reset or run slow.
An alternate method is available if the device is unresponsive or won't power on.
Press and hold the Power button (on the right edge) until the options menu appears then release.
Touch and hold Power off until the Restart in safe mode prompt appears then release.
From the Reboot to safe mode prompt, tap TURN ON SAFE MODE to confirm.
Allow approximately one minute for the process to complete.
Upon restart, Safe mode appears in the lower-left of the unlock/home screen.