AT&T Unlimited LTE Hotspot $20 without AT&T phones

That's really weird about the Sims
When I activated my Mobley, I read him the card number from the box
It's the bigger number above the esn number

He told me just a heads up, AT&T will send out another SIM, don't worry,
Keep using the Mobley as is, with the original SIM

Different rep, different story

But it did take three phone calls, the last one while I was sitting in best buy