As noted by MacRumors contributor Steve Moser and confirmed by Aaron Zolo, the iPhone 12’s layout introduces support for connecting a personal access point via faster 5GHz Wi-Fi, compared to 2.4GHz Wi-Fi on previous iPhones.
The personal hotspot over 5 GHz Wi-Fi is enabled by default on all iPhone 12. In the Settings> Personal hotspot on these devices menu, there is a new “Maximize compatibility” switch that returns Personal Hotspot to 2.4 GHz Wi -Fi, when enabled, as Apple notes, may reduce Internet performance on devices that are connected to the access point.
The combination of iPhone 12 models, which support 5G networks with higher speeds and higher maximum bandwidth on 5GHz Wi-Fi, paves the way for a faster personal access point, but testing will need to be done to confirm the exact speed improvements. Note that while 5GHz Wi-Fi is faster than 2.4GHz Wi-Fi, it has a smaller range, so the speed of the personal access point will vary depending on the distance of the connected device to the iPhone.