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[kjuh <704123@xxxxxxxxxxxxxxxxxx>]

I'm using 15.10 and am experiencing similar problems with a Sierra Wireless MC7710 internal LTE card.
I _did_ save the PIN in the connection settings of network manager, but the apparently it's simply ignored.
The respective connection is set to auto-connect if available.
If I wait long enough at the login screen for the WWAN to initialize, I'm asked for the PIN, but unlocking fails because of insufficient privileges.
After login I can unlock my SIM after entering the PIN _AND_ sudo authentication.
This Bug is now open for almost 5 years, so although I'm not a dev I would be glad to do whatever I can to help fix it, finally!

Any suggestions on what type of information could help, or what I could
try to narrow down on the cause?

-- 
You received this bug notification because you are a member of Desktop
Packages, which is subscribed to network-manager in Ubuntu.
https://bugs.launchpad.net/bugs/704123

Title:
  Network Manager asks for the PIN even if it is memorized

Status in One Hundred Papercuts:
  Triaged
Status in NetworkManager:
  New
Status in network-manager package in Ubuntu:
  Triaged
Status in network-manager package in Debian:
  New

Bug description:
  ****************
  HOW TO REPRODUCE
  ****************

  1. Plug the USB modem into a port.

  2. When you are asked to enter the modem's PIN, do along with the
  "automatically unlock this device" option.

  3. Unplug the modem, and plug it again.

  ******************
  EXPECTED BEHAVIOUR
  ******************

  - The modem to be automatically unlocked.

  **************
  REAL BEHAVIOUR
  **************

  - You are asked to enter the PIN again.

  ************
  WORK-AROUNDS
  ************

  - Changing the SIM's PIN to empty.

  - Renaming the "/usr/share/nm-applet/gsm-unlock.ui" file.

  
  ****************
  RELEVANT DETAILS
  ****************

  - The same behaviour when configuring the PIN from the "Network
  Connections" menu.

  - Even if the PIN is stored in "/etc/NetworkManager/system-
  connections/", Network Manager cannot retrieve it.

  - The bug makes the device to become locked as soon as network
  connectivity is lost for a while.

  - This bug forces administrators to tell the PIN to other users, while
  they will rather want to keep it in secret and just allow themselves
  to be able to configure the connectivity in specific devices.

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