This captioned video teaches user how to use a freely used cloud software "Wi-Fi Doctor", which is proudly developed by Yfisoft Limited. 7 a3 g1 l; G- O# g! m+ L. x 8 S d4 C8 G; s( T( kUser manual on Youtube: " ] a3 C( `% j! Dhttps://www.youtube.com/watch?v=k5VKiexTyGc ' k7 I9 @) m1 l9 f1 S5 v; F' b7 c
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