Wireless Joint

Does anyone know the exact name or number for the unlimited AT&T tablet program? I’m already a post paid customer with phones and Directv. I just want to know the easiest way to order it without paying someone on EBay. I have a 4GLTE Tablet that has never been registered. Thanks in advance.

Ive narrowed my latest purchase down to these 2 , Like to hear your pros and cons on each, I did have the mofi 4500 v2 sim 4 for 3 years in a remote location powered by solar before it gave up the ghost and I replaced it 2 months ago with a mofi v3 sim 8, ive moved since then and the lte signla is m...