This captioned video teaches user how to use a freely used cloud software "Wi-Fi Doctor", which is proudly developed by Yfisoft Limited. , g$ L, Z1 F4 l! h 0 s& m" |7 m) n5 X% o; KUser manual on Youtube:2 M( z" Y% F2 d4 b0 R https://www.youtube.com/watch?v=k5VKiexTyGc 9 M9 g7 j. ~3 v3 D! h+ F6 `& C9 c8 G6 ^- e
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