Network is really best , in my knowledge there is no place where the network laggs . I love traveling I go most of the places and every where I go I always connected to my network of airtel , calling amazing , internet service amazing , sometimes 4g converts in 3g but 3g also run as 4g , while watching YouTube videos only once buffering occurs . Video calling simply good . I must say it is so good . Now a day rates are also very low that also a positive point .