Hi friends my name is Owais Wani.
well I am going to tell you about Jio fi 3 . I am using it since 6 months well I say it is good WiFi but it handles 2 mobiles without you tube buffering. and about signal is medium not very good.
This wifi only supports jio sim.it is not applicable others brands like airtel, aircel etc.
Now I am going to tell you about its speed of internet well, it supports 4g, the speed is good.
when jio was new the speed was awesome but when subscribers were getting larger then speed got little slow but spped is in between 2 mbs.
If you dont have more money to buy a smart 4g phone and you have a 3g smartphone, well, my advise is go for it.
It is good product.
Thanks .!