Just an update… i was able to use the r404 on the pi model b once. As soon as i tried to send a message though it rebooted the pi and it did not power the r404 back up again. i also did get it working on my ubuntu laptop and was able to check signal and send messages. although i have to run the modprobe command everytime i reboot the laptop as the folders disappear. But i agree with the only response i have gotten so far i bought it to use with the pi as a data node not my laptop. And i read your post before i posted mine it also helped. To add this modem also causes both pi’s to reboot when i plug it in while running on a 1amp, 2amp, or 2.5amp power supply.