From the homescreen, press and hold the Power key.
Release the Power key, then tap and hold Power off.
Read the Reboot to safe mode message and tap OK.
The device will power off and restart in safe mode.
Swipe the screen to unlock the device.
Note: If prompted, enter your screen lock.
Safe mode is now enabled.
To disable same mode, press and hold the Power key.
Release the Power key, and tap Power off.
Once the device finished powering off, press and hold the Power key until it starts to power back on.
Safe mode is now disabled.