Reliance launch jio sim. Jio network is fully capable of delivering high speed data, VoLTE and above all a true 4G experience is good. There is no much difference between TD-LTE and FD-LTE. FD-LTE is Popular though 4G speed should be of minimum 10 Mbps in the network. It should support VoLTE Unlike 2G/3G sim cards. But 4g is good.