ok the easy part first.say you are an IRL streamer and you are streaming over that 5G, you don't want to put up with lag (hell, why should you since 5G was advertised to you as being virtually lag free), you need to send out encoded video chunks as soon as they are ready out of the encoder, thus your radio needs to be constantly ready to transmit and thus constantly powered up. Your phone will also keep trying to find the relay with the best signal, which again, tada, will rely on the radio!now, say you are streaming something to you phone, say a nice 8K 480fps video (for good measure because why not, 5G was sold to you promising to be able to deliver very high bandwidth and thus very high definition video); (provided your device can handle decoding such a stream in the first place) you are going to be looking at (I'm extrapolating from 4k60fps for youtube here, which is by no means the best bitrate for that resolution) roughly and at least 500mbits a second, twice that if you are using x264... which is 62megabytes a second, say your phone has 32gigs of RAM, 50% of which is in use by other apps and the OS (that's generous), 16gigs, you'll be able to buffer about 4 minutes of video, which fair enough is long enough to turn off and on again the radio; BUT in the mean time the tower will have stayed at full blast for other users doing exactly the same thing you are... their own use will overlap with yours meaning that relays will be at full Tx blast constantly. So basically relays will be at full power all the time even if your phone isn't.