How do you get an AT&T SIM card for a Winegard Connect 2.0+

Since AT&T no longer sells those as an unlimited data plan, you might want to look at some other options through some other known contract carriers that could provide you with an unlimited plan

Otherwise the best plan AT&T has is the 100 gig prepaid plan for $90 which you can find on the prepaid data only page

If it helps, the Winegard device uses a QUECTEL EC25-F and with my previous carrier (T-Mobile) it was simply inserting the SIM card and setting it up as a hot spot.

Huh, if what helps what?

You haven't said what plan you have. If you have an unlimited data plan you cannot add a dedicated hotspot type device with the exception of a connected car.

The winegard is not a connected car.

So unless you kept a hold of a very large old metered plan and are willing to handle the overages, you have no options to add a dedicated hotspot device with AT&T.  

Except the prepaid plan which is the least expensive or one of the post-paid plans which cost twice as much and charge overages

Wow, thanks I think....  That contradicts what the AT&T sales folks told us when we switched over from T-Mobile week before last.  But then again they told me just to go online and 'they' would send me a SIM card for my device....  Perhaps if I switched my notepad over to AT&T and used that SIM card...................

Sales... Typical. ☹️

So in other words the prices change so often AT&T doesn't even publish them?