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Many Lenovo ThinkPads come with a mobile broadband modem. By inserting a SIM card into the modem, it is possible to use a cellular network to connect to the internet.

. For Windows Mobile 6 devices, use ActiveSync 4.5(Windows XP) or Windows Mobile Device Center 6.1(Windows Vista/7). Windows 8 includes Windows Media Player. Windows 8 N and Windows 8 KN editions require Microsoft's 'Media Feature Pack' which includes Windows Media Player and its corresponding support software.
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Requirements

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The broadband modems in newer ThinkPads use the QMI modem protocol---see this article for more information. These modems will show up as /dev/cdc-wdm on the filesystem.

It is not yet (September 2014) possible to initialize a QMI modem for use on Linux. Use Windows to activate the modem using Lenovo's activation app (or web search for 'Lenovo mobile broadband' for the correct app for your modem). The modem will not work until it has been correctly initialized using the app.

Procedure

Install the libqmi package available in the official repositories, which provides the qmicli and qmi-network programs. Also install net-tools, which provides the ifconfig command.

There is a helper script for qmi-network available on GitHub. Save the script to somewhere in your $PATH and make it executable, and then review the script. The values of some of the variables might need to be changed, especially WWAN_DEV.

Load the kernel modules qmi_wwan and qcserial:

Also read the readme on the GitHub page of the QMI helper for any further prerequisites. In particular, you may need to set the APN provided by your cellular internet provider in /etc/qmi-network.conf.

Finally, running qmi_setup.sh start should start the cellular internet connection.

Alternative method

Reference information: http://www.thinkwiki.org/wiki/Qualcomm_Gobi_2000

First of all you need to make sure what model your modem is. Open your thinkpads backplate and look for IC or FCC ID. For this example we're going to use GOBI2000 (IC: 2723A-GOBI2000, FCC ID: J9CGOBI2000-L)

Enable your modem device from you BIOS I/O settings.

Download the driver installer exe from support.lenovo.com/en_US/downloads/detail.page?DocID=DS001302 and extract it with Wine. It will unpack the drivers to ~/.wine/drive_c/DRIVERS/WWANQL. The unpacker will prompt you to install the drivers automatically after unpacking, but if you need the installer again it's GobiInstaller.msi in previously mentioned folder. The installer will in turn unpack the firmware images to ~/.wine/drive_c/Program Files (x86)/QUALCOMM/Images/Lenovo . Now refer to the reference information on what firmware you want/need. Generally you are good to go with the Generic UMTS and Default Firmware (Forlders 6 an UMTS)

Download gobi loader from http://www.codon.org.uk/~mjg59/gobi_loader/, follow the instructions to make and install (you might need to 'sudo make install'). Now copy the 3 previous firmware files to /lib/firmware/gobi (if the folder doesn't exist, create it). Insert your sim card to the port found under your battery pack and restart. Your modem should now show up in your network manager.

Getting around BIOS-level whitelist restrictions

In newer ThinkPad models, it is normally impossible to swap the LTE modem for a supported one due to BIOS-level restrictions ('whitelists' of allowed M.2 expansion cards) implemented in all modern Lenovo laptops. However, a method has been found to configure any Sierra Wireless EM73xx/EM74xx modem to 'evade' the whitelist checks, so these modems can be used normally.

We will assume the model to be Sierra Wireless EM7455 here.

Settings for Sierra Wireless EM7455

General description

Use AT!CUSTOM='FASTENUMEN',0 AT command to disable the modem's USB fast enumeration feature. The modem will take a significantly longer time to appear on the USB bus and the firmware will 'miss' the modem at boot time.

Alternatively, use AT!CUSTOM='FASTENUMEN',2 to selectively enable USB fast enumeration for warm boots only. The modem will reappear faster on S3 resume but still evade the whitelist checks on regular boots and reboots (the mechanism of this effect is not fully clear to the author).

This comes with a downside: because the firmware does not 'see' the modem, it will not export the WWAN rfkill but instead it will unconditionally assert the W_DISABLE pin of the M.2 slot, forcing the modem into 'airplane mode'.Use AT!PCOFFEN=2 AT command to configure the modem to ignore this pin.

Step-by-step

1. Boot the laptop with the stock modem in place and WWAN card access enabled in BIOS setup.

2. Suspend the laptop (make sure it is configured to use S3).

3. Hot-swap the stock Fibocom modem with the Sierra Wireless one, then resume. Whitelists are not consulted at S3 resume.

Check that the modem is present on the USB bus:

Remember the VID (vendor ID) of the modem (1199 in this example).

4. Stop ModemManager, if it is running:

5. Optionally, update the modem firmware with the qmi-firmware-update tool:

6. Change the modem's USB composition to enable AT command ports:

7. Power-cycle the modem as advised by qmicli:

8. Wait for the modem to reappear, then verify:

9. Verify that the three serial ports /dev/ttyUSB0, /dev/ttyUSB1 and /dev/ttyUSB2 are now available (assuming you do not have any other USB-serial converters plugged in):

10. Attach to /dev/ttyUSB2 with a serial terminal emulator of your choice (e. g. screen):

11. Enter the AT commands (note that you do not need to type OK, the replies are included here as part of a session transcript):

11.1. Enable command echo (if echo is initially disabled, you won't see this command as you type it):

11.2. Unlock engineering commands:

11.3. Check customization options (these are the author's options):

11.4. Configure USB fast enumeration (swap 2 for 0 if you want to play it safe):

11.5. Verify:

(it should now show the FASTENUMEN option alongside others)

11.6. Configure the modem to ignore W_DISABLE:

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11.7. Verify:

11.8. Reset the modem:

(the terminal will disconnect after a while)

12. Wait for the modem to reappear, then verify configuration by rebooting / powering down / hard resetting the laptop.

Remarks

For more information (including the original thought process that led to this discovery), see these lenovo^{[dead link 2020-04-03 ⓘ]}threads and this reddit thread.

You may also apply other useful configuration options described here.

Troubleshooting

Ensure that you have initializ

Drivers I-o Data Mobile Phones & Portable Devices