Airtel cpeed of ISP connection is very best but some time sumsung mobile in show remove and re insert your sim card 4 g lte . Really connection Reliable and usefull thanks forg lte .but 4g rate is high. Service and support is very fast and I have no any compaint on 4g lte .Some fiture add extra on 4g airtel network problam big mistek kishangarh network problam the airtel network speed good but sometime voice colling not succes