Airtel 3G wifi data card is a useless product and it is just the west of money. my friend buy this data card 3 year ago. it just a garbage. speed of the connection is very poor. we were trying to open a website page but it was taking a lot of time. some time network came but after a while it just Lost! Talking about connection reliability, this connection is no more reliable. its from Airtel so service and support for this product are good. please do not ever buy this.