Apple recently announced that is not building millimeter-wave spectrum antennas into the next generation SE iPhone. Interestingly, this is a phone sold by Verizon, which spent a year advertising on TV and showing us speed tests on cellphones that were receiving gigabit speeds.

As a reminder for those who have never encountered the technology, Verizon and AT&T both deployed some millimeter-wave hot spots in downtown areas of major cities at the height of the 5G marketing craze. The frequency was only available on special phones made at the time to receive the faster speeds.

I always assumed that this was a marketing gimmick because it makes no sense as a deployed technology. The speeds can be blazingly fast, but the millimeter-wave signal only carries perhaps 1,000 feet from a hotspot – and that is with zero objects in the path. Millimeter-wave spectrum penetrates nothing, and the technology is so finicky that if you were receiving a signal and turned away from the transmitter, your body would cut off the transmission. The frequency is not well suited for busy urban streets. It can’t reach around corners, barely goes through glass,  and is blocked by anything moving into its path.