Note: In stock on December 22nd, but you may place your order now.
I believe they give you 2.5 GB and then cap your usage each month to 2G.
There are threads that states it is possible but your YMMV on activating 4G LTE on the AT&T network. Some have reported being able to do it by finding the right CSR.
You can also bring your own device using either AT&T or TMobile SIM cards in standard or Micro but not Nano. Cost is around $7 plus tax.
Please note this is fulfilled by Amazon
Also if you have not purchased anything over 1500 for the last 3 months, Discover and Chase are still offering the 5% CB on Amazon purchases making this slicker.
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Remember Chase and Discover 5% CB reward for the month of Nov and Dec if you have not hit the cap