An iPhone hotspot vulnerability that Apple hasn't fixed yet breaks your ability to connect to wireless networks, requiring a factory reset to restore Wi-Fi functionality.
All iPhone models from the iPhone 12 onward can use a faster 5GHz Wi-Fi band to boost hotspot tethering performance. But if your client devices encounter issues with the 5GHZ band, you can always set your Personal Hotspot to use a slower 2.4GHz Wi-Fi band. Follow along to learn how to switch between 2.4GHz and 5GHz bands for the iPhone hotspot tethering.