he Biggest iPhone News Is a Tiny New Chip Inside It By embracing ultra-wideband location tech, Apple has a chance to reshape experiences way beyond AirDrop. UWB is more accurate by orders of magnitude. And it can transfer data faster too; up to 8 megabits per second in mobile devices, about four times what Bluetooth can currently manage. UWB operates on a wide frequency band, allowing it to pass through walls more easily than some of its RF counterparts. It can provide positioning updates as often as every 100 milliseconds. And it doesn't interfere with other mainstream RF signals like Wi-Fi.

https://www.wired.com/story/apple-u1-chip/