This captioned video teaches user how to use a freely used cloud software "Wi-Fi Doctor", which is proudly developed by Yfisoft Limited. 6 Y" O+ z7 Z6 M; R' {4 h4 q 1 N3 L* I3 N5 h( D5 WUser manual on Youtube: + v. X4 _2 c' g$ G& A- e+ }% ihttps://www.youtube.com/watch?v=k5VKiexTyGc e/ Y0 r( x6 l9 E$ N& o * o& q' J( C x( A6 K- b1 nFor enquiries, you may contact Yfisoft Limited at (852) 3524 7258 or email info@yfisoft.com.