Hi Tam,
Full iGRID instructions - including how to set up the connection to your phone hotspot - are available on the PilotAware website here...
https://www.pilotaware.com/knowledgebase/igrid-operating-instructionsEDIT:- I should have said that although the initial instructions refer to iOS devices, it works pretty much the same with most Android phones (I have been using it on a Samsung Galaxy S9+ for over a year).
After installing the latest software and adding your iGRID WiFi Dongle, activate the Mobile Hotspot option in your phone (in Settings / Connections), then 'open' the Mobile Hotspot Tab and take note of the phone's Mobile Hotspot WiFi Network Name and Password.
Next connect to your 'normal' PAW WiFi (preferably on a separate device such as a tablet) then login via 192.168.1.1 and go to the 'Networks' Tab. Look for your phone's Hotspot Name which should appear on the list at the foot of the screen - or if not shown refresh the list by clicking on the 'Refresh' button. If it still doesn't appear, double check that the Mobile Hotspot is on and that you have a good 4G connection and that mobile data is activated.
Select the required phone hotspot from the drop down list, then type in the Hotspot Password and press the 'Save' button. The selected hotspot should now go green on the list. On future startups the mobile hotspot will auto select provided it is activated on your phone.
If you also want to allow other programs such as SkyDemon to access the internet in flight, 'Enable' the Router function, then enable 'Use Internet in Flight' in SkyDemon / Settings / Navigation Options.
Any problems feel free to come back on here.
Regards
Peter