Iconia 3G Modem tutorials - Check your version first!:

for the 3.0 version usb 3g stock
create a version 3.1 3.1 3g usb honeycomb stock

copy file earlier to micro sd

steps
1. root
2. acer recovery install the installer from the market, and then install ClockWorkMod of this application
3. reboot, press power and volume -
4. select install zip file
5. trus flash file search
6. wait a few moments.

there are friends who try to shut down its first Iconia then plug the modem, and turn it on again,

then setting apn in the wireless network ---> mobile network -> apn


good luck