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[Lars Melin <larsm17@xxxxxxxxx>]

(In reply to marius from comment #1)
> From the logs, it seems like there is some issue detecting/configuring the
> network interface of the modem.

There is no network interface in the lsusb listing provided by the
reporter, there are 3 serial interfaces:

if#0 utps_modem
if#1 utps_pcui
if#2 utps_diag

A 12d1:1506 without any kind of net interface is unusual for a Huawei LTE device and also remarkable since idProduct in the lsusb listing describes the device as a "Modem/Networkcard". 
The 3rd digit in 4 digit Huawei product numbers denotes the speed where 7 indicates CAT4.
There is no way Huawei would produce a LTE CAT4 device with only ppp modem dialup so I'd say that this dongle has been tampered with, the net interface has been disabled via AT SETPORT cmds.

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https://bugs.launchpad.net/bugs/1404068

Title:
  No internet connection with Huawei E3272 4G modem

Status in ModemManager (with NetworkManager support):
  Confirmed
Status in modemmanager package in Ubuntu:
  New
Status in usb-modeswitch-data package in Ubuntu:
  Invalid
Status in usb-modeswitch-data package in Debian:
  Fix Released

Bug description:
  There is no internet connection. My mobile broadband LTE modem is Huawei E3272. Attached a syslog.
  Ubuntu 14.10
  modemmanager 1.2.0-1

  This might contain useful information:
  http://askubuntu.com/questions/525965/huawei-e3272-ubuntu

To manage notifications about this bug go to:
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