TI LM3S ARM Cortex M3 with USB 3G Modem
I think You can use a 3g modem with it along with  a powered usb hub and a linux Shell script Sakis3g. I had Sucessfully installed sidux on a cheap China tab[arm a10 1GHz, 512 Mb DDR2 with a micro usb host] and useing a 3g modem with it via this method &amp; working pretty good for me.