A rather large notch at the bottom right edge, which may seem strange to some.
mmWave is a 5G band that offers impressive speeds (around 500+ Mbps), but the downside is limited range. This means that service providers will have to install more cell towers to get better 5G coverage.
The sub-6GHz 5G band in the US typically achieves speeds of 100 - 150 Mbps, which is also easier to deploy, but the speeds are far behind mmWave.