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I have a USB 3G mobile modem (ZTE MF626) and I'm having trouble to use it on ubuntu (11.10). The device is not recognized when plugged. But the LED light on the modem is on, and, if you insert a memory card on the slot (MSD), the device is recognized. I've checked on Windows, the modem internal storage device is CDFS formatted.

I already searched the web about it, but the most problems are about connection and configuration (the modem is being recognized).

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The modem has a memory card slot? That's weird. CDFS is what windows calls the iso9660 cdrom filesystem. You probably see it because the device is using the silly trick of pretending to be a cdrom drive in order to get windows to autoplay an application installer. You may be able to use the usb-modeswitch package to switch the device out of the dummy cdrom mode and into normal mode.

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yep! there's a MSD Card slot on the modem. On Windows, it's behavior is: when modem is connected it is recognized as a CDFS device and asks to runs the internal software. Once the modem software is running, the CDFS device is "disconnected" and, if you have some car in the slot, this storage device appears. On Ubuntu it goes right to the MSD card (or does nothing, if empty). I'm gonna try usb_modeswitch here. Thanks! – fuadksd Feb 27 '12 at 2:21
I've tried to install here but, tough that I'm a big noob, I couldn't make it. I got problems with the make. Is there some step by step easy to understand so I can follow it? – fuadksd Mar 5 '12 at 1:43
@fuadksd, you tried to build it from source? Just install usb-modeswitch package. – psusi Mar 6 '12 at 0:00

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