Today FreedomPop announced the availability of the MiFi 500 (the tri-band one...they just call it by the internal model number rather than the marketing model number) on their service. This includes the free 500MB data option, as well as the more expensive plans (e.g. 2GB for $20). The device itself is $150.
They're offering a couple of promotions right now that net you 3GB at no additional charge (beyond the device cost) for the first month.
I'm trying to pick one up but am having issues getting their website to let me order anything.
For folks who want to try out TD-LTE/LTE in 800 and don't want to sign a contract/don't need 3GB of data on their hotspot and don't want to pay $35+ per month as a result, this works. And the 500MB plan (400MB if you don't want the possibility of paying overages) is enough for occasional access...and it's free!