I have an iPhone 6 with a GoPhone 2GB data-only SIM, I turn the Personal Hotspot feature on, connect to the wifi network successfully from other devices, however DHCP does not appear to work. I statically set IP to the 172.20.10.x network and still nothing. I take the GoPhone data-only SIM out of iPhone, put it into a Google Pixel phone and hotspot from Pixel phone works great every time. What is the trick to making it work from iPhone? Extremely frustrating!!