How to scan documents on a smartphone HTC

HTC Desire 816 Dual HTC Desire 816 Dual
HTC One M7 HTC One M7
HTC Wildfire X HTC Wildfire X
HTC Wildfire R70 HTC Wildfire R70
HTC Wildfire E1 HTC Wildfire E1
HTC Desire 20 Pro HTC Desire 20 Pro
HTC Desire 22 Pro HTC Desire 22 Pro
HTC Wildfire E plus HTC Wildfire E plus
HTC Wildfire E3 lite HTC Wildfire E3 lite
HTC U23 Pro HTC U23 Pro
HTC Wildfire E star HTC Wildfire E star
HTC U23 HTC U23