In a message about "Re: Standalone cellular modems?", DTC wrote:

>> I use the KR1 by Kyocera. Works fine but it doesn't support
>> the (Sprint) Sierra cards at all. I use mine with a Novatel
>> U720 and a Novatel S720 with good results.
>
> I had to install an update patch for my Pantech card.

Yep, I think the latest firmware is .10 or something like that.