Galaxy Note 5 - How to restart if the device appears to be freezing or not responding when touching the screen?
If your device freezes or hangs, you may need to close apps or turn
off the device and turn it on again.
If your device is frozen and unresponsive, press and hold the Power button
and the Volume button down simultaneously for more than 7 seconds to restart it.
If after restarting the device you still find your device freezes sometimes or is
sometimes unresponsive, there are some actions you can try to help correct
If the problem is still not resolved, contact a Samsung Service Centre.
Related Model Information
SM-N920CZDAXSG, SM-N920CZDEXSG, SM-N920CZKAXSG, SM-N920CZKEXSG, SM-N920CZSAXSG, SM-N920CZWAXSG