This captioned video teaches user how to use a freely used cloud software "Wi-Fi Doctor", which is proudly developed by Yfisoft Limited. ' Z2 X m! T2 ^& ?7 y5 Y " W4 [" a6 a o$ v1 p0 a; IUser manual on Youtube:1 ?& H! W) h! r https://www.youtube.com/watch?v=k5VKiexTyGc 7 \+ w1 o/ ^" K# L! T) ]2 T; e1 g1 v
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