Hi Syed and Nazmul,
Now everything is working fine with th USB HUB. I was doing 1 mistake that I was connecting OTG port in the one of the 4 o/p port of USB Hub but actually it has to be connected in input port of the HUB.
What you have to do is buy 1 female to female connector and give OTG Cable Type A out to 1 Female connector side and other side connect it to the Input of 4 port Type A side of the HUB.
Regards,
Vineet
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