I want to use a iPhone 5 as a wifi hotspot.
I turn on hotspot on the iPhone, everything works fine till the device using the hotspot stops using it (close the cover on my iPad for example). When I open the cover of the iPad again, the connection is lost and does not restart automatically.
I called Apple, they said the iPhone stops broadcasting the wifi signal after 90 seconds idle time.
To prevent this use settings General > auto lock > never.
This prevents the phone from sleeping but opens it up to security violations if I take it on the road.
Testing underway, will publish results.
Test1: let iPad with cover closed (sleeping) for 1 hour, reopen cover and after a moment, wifi connection working fine.
Test2: casual used of iPad seems to work fine so far.