Um... Yes they are. The Galaxy S10 5G has a mmW radio in it that’s transmits mmW waves for the uplink. The 5G spec also requires certain protection when the UE

Um... Yes they are. The Galaxy S10 5G has a mmW radio in it that’s transmits mmW waves for the uplink. The 5G spec also requires certain protection when the UE (phone) Tx wave might go through tissue. But you’re correct that it doesn’t make a whole lot of sense to attempt to Tx/Rx on a beam pointed at your head since it will lead to drastically lower SNR