Windows 10: Cellular Disconnected Solved

  1. Posts : 262
    Windows 10 Pro for Workstations
       11 Jun 2018 #1

    Cellular Disconnected

    I have a cellular modem in my Dell Precision 3520. I used it Friday without any problems at all. Today, as I'm at work, I cannot connect to AT&T's cellular network.

    When I click the network icon in the system tray, it shows my cellular connection as "AT&T (HSPA)" and then reads "Disconnected" underneath it. It shows 5 bars. If I open network properties and try to troubleshoot the adapter, it gives me a SIM2 error that says I need to enter a PIN code (there is no PIN code on the SIM card, but just for troubleshooting purposes I added one, still got the same error, and then ultimately removed it again).

    Things I have tried so far:
    • Toggling cellular on/off
    • Rebooted computer (several times)
    • Uninstalled and reinstalled the driver (twice)
    • System restore to the point where it was working the other day
    • Ejecting the SIM card and reinserting it
    • Verifying that data is turned on with my AT&T count
    • Enabling/disabling PIN code
    • Resetting network settings via command prompt
    • Creating a new APN (with phone, NXTGENPHONE, etc.)

    Any tips?
      My ComputerSystem Spec

  2. Posts : 4,775
    Mac OS High Sierra 10.13.5
       11 Jun 2018 #2

    if you are roaming and on ATT's network, contact them. If you have been making changes on the modem, it can cause issues and even possible that your modem is bad or the network is down.
      My ComputerSystem Spec

  3. Posts : 262
    Windows 10 Pro for Workstations
    Thread Starter
       11 Jun 2018 #3

    I never thought about it being the network. The hospital has a tower/repeater they purchased for the hospital. I'm betting that's causing some problems. My iPhone X connects and can get data without problems though. I try to use the cellular connection because it's sometimes faster than the hospital's wifi system.

    I haven't made any changes to the modem. I turned on roaming this morning while trying to troubleshoot everything.

    Hopefully not a bad modem. Confusing that it shows 5 bars, so I'm hoping that it's not the modem.
      My ComputerSystem Spec

  4. Posts : 4,775
    Mac OS High Sierra 10.13.5
       11 Jun 2018 #4

    If the internal cellular repeater is causing it, get with the IT unit that runs the hospital and have them help diagnose what is going on. Roaming only works if you are not on a U.S. based network that does not have a roaming agreement with your carrier.
      My ComputerSystem Spec

  5. Posts : 262
    Windows 10 Pro for Workstations
    Thread Starter
       11 Jun 2018 #5

    Wasn't the tower. Still doing it. I called AT&T and he said he sees it online.

    So now it's down to a hardware or firmware issue. Nothing has changed with my setup unless something was autoupdated. I would think a firmware issue would have been fixed with a system restore. Going to take the cover off the laptop in a bit and examine it.
      My ComputerSystem Spec

  6. Posts : 262
    Windows 10 Pro for Workstations
    Thread Starter
       11 Jun 2018 #6

    I've popped out the SIM and put it back in. Took the cover off the bottom of the laptop and examined everything -- everything is still connected. I reset network settings from scratch. Still no connection.

    When I run the troubleshooter to diagnose the problems, it's giving me a SIM PIN2 error. I don't see where I have an option to enter it anywhere in Windows 10.
      My ComputerSystem Spec

  7. Posts : 262
    Windows 10 Pro for Workstations
    Thread Starter
       11 Jun 2018 #7

    Weird, it started working again on its own. Not sure if I should rejoice or if I should be worried!
      My ComputerSystem Spec


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