Amazing, they actually have a separate line for 5G active.
Nope, mine obviously does not include that line.
Their 5G mobile service should perform great since no-one is on it.
On watch go to Settings, Connections.
Select Mobile Networks
Choose Always On (if on auto you will not get access to the settings below)
Go to Access Point Name and Add New
Name = anything, eg airmobile
APN = ws.air.mvno
Select the APN created, eg airmobile
Can change back to Auto
I have not read through the whole thread, so apologies if posted before.
Air Mobile eSim is supported on my Galaxy Watch 5.
Got 2 eSims, 1 for my phone, and 1 for my watch.