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On 2014-10-14T09:16:02+00:00 Aleksander Morgado wrote:

Originally reported at:

https://bugs.launchpad.net/ubuntu/+source/network-manager/+bug/540003
https://bugzilla.gnome.org/show_bug.cgi?id=632219

The Ericsson/MBM modems don't use PPP for the data connection, as they
expose a network interface, and therefore the APN authentication
settings (user/pass) are not given to pppd. Instead, ModemManager uses
the following command to preconfigure the authentication settings to use
before launching the connection:

  AT*EIAAUW=2,1,"username","password"

The given username and password are given in the current charset
encoding configured in the modem, which should be UTF-8 preferably.

Now, the problem is that when special characters are required by the
operator, e.g. in the username, the connection will not succeeed. E.g.
for A1/Austria operator:

  AT*EIAAUW=2,1,"[email protected]","ppp"

The issue may therefore be that we either don't pass the
username/password encoded properly OR that the modem firmware actually
has a bug in that command handling.

Debug logs with MM 1.x are needed.

Also, it would be a good idea to check whether the setting is READ properly 
after being written, with:
  AT*EIAAUR=2,1

Note that PPP on the TTY with those same username/password will actually
work.

Reply at: https://bugs.launchpad.net/ubuntu/+source/network-
manager/+bug/540003/comments/23


** Changed in: modemmanager
       Status: Unknown => Confirmed

** Changed in: modemmanager
   Importance: Unknown => Medium

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https://bugs.launchpad.net/bugs/540003

Title:
  network-manager doesn't work with dell 5530 hsdpa mobile broadband

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