Hotspot mode is supposed to be triggered automatically when the AxiomAir is unable to reconnect to the WiFi network for which it was set up. Doing a factory reset puts it into Hotspot mode because it removes the information required to connect to a WiFi network -- but now the AxiomAir won't connect to your main WiFi without reconfiguring it.
If you'd like to test that HotSpot mode would work when away from your home network, you could try turning off your WiFi router/access point, which should then after a brief delay cause your AxiomAir to switch into HotSpot mode.
Hope this helps!
