Does it? I thought Americans were still using alternative frequencies to everyone else.

[Edit]

It appears that the US doesn't overlap with the majority of the world for most of the ranges, except for one band at the top which overlaps with Japan/Korea.

https://5gobservatory.eu/5g-spectrum/

> Currently, the most used bands are:

- Low-band: 700 MHz (except in US); 600 MHz (US)

- Mid-band: 3.3 – 3.8 GHz (except US); 2.6 GHz, 3.7 – 4.98 GHz (US)

- High-band: 26 GHz (except Japan, South Korea and US); 28 GHz (Japan, South Korea and US)

At this point frequency compatibility is purely a firmware setting, no? It seems like every 5G (and even 4G) phone these days supports every frequency on a chipset level and just enables/disables some of them depending on the intended region.