Airtel 3g wifi data card.it is very usefull to use a internet.it is one of the superb and great device.
Because they give space for memory card too.u can use airtel 3g data card to data card. u can use to tranfer file between laptop to phone.it is very usefull for many device. and about speed.airtel is great network in worldwide.because in our it gives a super and great speed.it will give a nice speed.and u can surf your web very easy.u don't have worry about the internet speed.in my opinion. and from different many data card it is one of the best.i have used.because of the great idea.and memory card slot and super speed.
