Instructions to make video calls on THL devices

THL T6S THL T6S
THL T6 Pro THL T6 Pro
THL 4000 THL 4000
THL 2015 THL 2015
THL T12 THL T12
THL 5000T THL 5000T
THL 2015A THL 2015A
THL T6C THL T6C
THL T7 THL T7
THL T9 Pro THL T9 Pro
THL T9 THL T9
THL T9 Plus THL T9 Plus
THL Knight 1 THL Knight 1
THL Knight 2 THL Knight 2