Instructions to make video calls on HTC devices

HTC Desire 820s HTC Desire 820s
HTC Desire 820G+ HTC Desire 820G+
HTC Desire 620G HTC Desire 620G
HTC Desire 826 HTC Desire 826
HTC Desire 626G HTC Desire 626G
HTC Desire 326G HTC Desire 326G
HTC J Butterfly HTC J Butterfly
HTC Desire 728 HTC Desire 728
HTC One E9s HTC One E9s
HTC One M9e HTC One M9e
HTC Desire 828 HTC Desire 828
HTC Desire 728G HTC Desire 728G
HTC Desire 728 Ultra Edition HTC Desire 728 Ultra Edition
HTC Bolt HTC Bolt
HTC Desire 550 HTC Desire 550
HTC Desire 555 HTC Desire 555
HTC Desire 10 Compact HTC Desire 10 Compact
HTC X2 HTC X2
HTC U19e HTC U19e
HTC Desire 19+ HTC Desire 19+