Jio voice good clear voice fast conecot calling hd quvality same time not in range can’t conecot to the call The catch is that Reliance Jio runs fully on 4G so The catch is that Reliance Jio runs fully on 4G so unless you have a compatible phone, you’re not going to be able to use the network. phone doesn’t support 4G and VoLTE not going to be able to use Jio. have a compatible phone, to use the network. If phone doesn’t support 4G ( for data) and VoLTE ( for calls) , not going to be able to use Jio so by new 4g phone