Using the airtel 4G almost for 8 months.and its a hotspot device which works very fine and amble to connect all the devices in home with this hotspot, there is no lag in connection or in speed which I had identified. Almost simultaneously 4 to 5 devices connected to it all the time and the speed is awesome:)
I would definitely recommend it. but the only thing disappoints me is the needs to be connected to the charger all the time as it drains the power too much as it is always on:) but not an issue though.Very nice reception in my area(HYD). Just Go for it.