I finally had the time to go buy the sim cards for the new Pepwave Max Transit 5G Cat 20 router that I recently bought from the 5G Store.
AT&T:  "What's a Pepwave?" 
Me:  I want the 100G plan for $55/mo
AT&T:  Can I have your drivers liscense please?  After 20 minutes my text chimes and Life Lock is alerting me that someone is using my SS# to set up a new account and this guy can't even tell me if he has a 100G plan for $55/mo.  But he has to check all his boxes and go through the procedure or he can't function so I stood patiently while he did his thing.
Me:  Did you find it yet?
AT&T:  Let me check with my Manager.
Manager:  What's a Pepwave??
AT&T:  This is a pre-paid account so if it doesn't work we can't give your money back.  You need to buy the business plan for 40G at $85/mo.
Me:  Just sell me the Sim card.  I know it'll work.  Neal said it would work.    (After an hour I finally got what I came for.)
T-Mobile:  Sure thing!  I know what a Pepwave is.
Me:  Great!
T-Mobile:  Here's your Sim card.  You can pay on-line or by downloading our app.  Thank you for your business!
Me: Thanks!  (15 minutes tops.)