How to safely shut down or force shut down HTC devices

HTC Desire 626s HTC Desire 626s
HTC Desire 626 (USA) HTC Desire 626 (USA)
HTC One M9+ Supreme Camera HTC One M9+ Supreme Camera
HTC One A9 HTC One A9
HTC Butterfly 3 HTC Butterfly 3
HTC One E9s dual sim HTC One E9s dual sim
HTC Desire 728 dual sim HTC Desire 728 dual sim
HTC Desire 828 dual sim HTC Desire 828 dual sim
HTC One M9s HTC One M9s
HTC One X9 HTC One X9
HTC Desire 625 HTC Desire 625
HTC Desire 530 HTC Desire 530
HTC Desire 630 HTC Desire 630
HTC Desire 825 HTC Desire 825
HTC 10 HTC 10
HTC 10 Lifestyle HTC 10 Lifestyle
HTC One S9 HTC One S9
HTC Desire 830 HTC Desire 830
HTC One M9 Prime Camera HTC One M9 Prime Camera
HTC Desire 628 HTC Desire 628