But underneath it’s just unicast to your phone, no?
But anyway, beamed directly it may be, it’s called beamforming.
In the world of 5G, this is the act of focusing a wireless signal in a specific direction. Compared to simply sending a signal across a wide area, beamforming requires more sophisticated antenna technology.
[…] Beamforming technology, on the other hand, sends a precise and concentrated signal right to your smartphone. It is more deliberate and intentional with its delivery method.
Edit: Forgot source of quote: https://surecall.com/surecall-cell-phone-signal-booster-blog/5g-explained-beamforming-dss-in-plain-english/
Pine64 devices like the PinePhone still use it for serial: https://pine64.com/product/pinebook-pinephone-pinetab-serial-console/