I am using airtel as a network operator.l have airtel prepade talking about 4g connectivity it is not that fastest as they showing adds.I beacme one of the victim and port my sim to airtel it shows only network and not give proper speed.it does not give alert message when yout date consume 50% or any but directly gives alert when 10 mb data reamins and nothing will run proper. Genieunly get irritated when such things happens.