The speed is always good.usually download speed is 4-5mbps and I love it.i would say it is great and it is also very cheap.all you have to do is recharge a 3g pack and go on but the speed also varies from location to location. We Know That Airtel is one the costly Telecompany service provider and they are the first to launch 4g network in India. But it is covering almost all the places in india and roaming on 4g network is even free thats what I am loving about airtel