I didn’t see your reply first, when I say APN thing it just means I configured my phone. When I tried to join my iPad to my phone hotspot just comes up as “ unable to join…. Or unable to find Shirley’s phone “ I tried to turn off and on my both WiFi ...
I have the same issue as well with hotspot, I did the APN thing, it still won’t work, both my iPad and laptop won’t connect to my hotspot. When I was with Vodafone it works fine