Airtel is the first operator to offer LTE 4G in India and their network is pretty strong and most importantly consistent. The hotspot will switch to 3G if 4G signals are not available. This device is a boon for people who travel and are in need of constant reliable internet connectivity . yhe battery life is around 6 hour after charging it fully and the network I and the speed is very good . it is very small that it can be kept in your pocket