Throughput issue on max otg

We have configured max otg device for our client.We have done speedfusion and everything also we have connected 3 3g dongle in max otg device.But when we transfer 10 mb file it takes long tome.the thorughput also showing very less transfer rate as 50 - 100 kbps.please assist me on this issue immediately.

Please open a support ticket for further investigation: