Well I just researching more on this & I guess this was what prompt me to ask about the b-mobile device. Poster here claims it uses a sim that be used in a phone.

http://forum.gaijinpot.com/showthread.php?t=79804

Other then this the other option would be the same USB modem, but with a Cradlepoint PHS300 personal wifi device. This isn't ideal though because of the low 90 minute life.

I wonder how much 150 hours is converted to $/data?