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I am using Ubuntu 12.04. I am having problems getting my dongle to work. After I plug in the modem the network notification shows me that the device has been detected, but each time I try to connect to the internet it displays an icon that shows its trying to connect and then instantly disconnects.

How can I get it to work?

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Does any of these answers help? askubuntu.com/questions/73398/… –  Jakob May 18 '12 at 9:02
    
does ubuntu detect the modem and you can create a new mobile braodband connection ? Make sure to give correct APN, userID password (if require). After that if the same problem occurs try this → askubuntu.com/questions/122537/… –  Web-E May 18 '12 at 9:23
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3 Answers

I solved a similar issue disabling the automount for such a device, editing my fstab with "noauto,exec" options. This worked because these device are both a modem and removable media storage, and it seems one excludes the other.

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Can you give more exact instructions? –  fleamour Aug 31 '12 at 18:48
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just be sure to check your internet bill if you're billed by the Gb. the Huwei decided it was a phone on some distros and the internet company decided I had put the chip in a phone charging an extra several hundred $. since it was all data they did roll it back to keep me as a customer because I have no contract and own the Huwei internet key outright.

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I had the same problem with my updated ubuntu (12.04 64-bit) after upgrade from 11.10 (modem worked without any hints).

To solve this problem, use terminal (linux or even windows - hyper terminal) to access AT commands and turn device to modem-only mode: AT^U2DIAG=0

In case you'll need other modes, you can turn it back:

AT^U2DIAG=0 (modem only)

AT^U2DIAG=1 (modem + CD-ROM)

AT^U2DIAG=255 (modem + CD-ROM + Card Reader)

AT^U2DIAG=256 (modem + Card Reader)

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