> Try to set up a hotspot, there is no button to turn the hotspot on/off.
There is. You can even put it on the settings drawer. Look for "personal hotspot".
I don't have a mac anymore, but IIRC you could even turn it on from the paired mac. This definitely still works between iphones. When I take out my old iphone from the drawer to use as a GPS on my bike, with no sim card, it will connect to my regular iphone's hotspot automatically.
There is. You can even put it on the settings drawer. Look for "personal hotspot".
I don't have a mac anymore, but IIRC you could even turn it on from the paired mac. This definitely still works between iphones. When I take out my old iphone from the drawer to use as a GPS on my bike, with no sim card, it will connect to my regular iphone's hotspot automatically.