This captioned video teaches user how to use a freely used cloud software "Wi-Fi Doctor", which is proudly developed by Yfisoft Limited. 0 Z7 l+ o- k& j& t4 K9 }6 t8 u , z% M4 a' G) _1 C5 C. d* [User manual on Youtube: , d$ W* [ g9 Z! C+ z9 [. l& dhttps://www.youtube.com/watch?v=k5VKiexTyGc 6 e& S# I X* v: O. c4 G: b$ O# l7 W7 B3 j: V# y. U# E( o
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