Enable VoLTE

VoLTE is required for all carriers in the United States and many international carriers. Librem 5 and Liberty phones currently ship with VoLTE enabled by default, but VoLTE may need to be enabled manually:

  • on older devices

  • if VoLTE had been disabled

  • if the modem firmware had been reflashed

This procedure checks your modem firmware version and whether VoLTE is enabled:

  1. Launch a terminal.

  2. Run the following command to install the BM818 modem tools:

    sudo apt install bm818-tools

    Enter your password when prompted. For security purposes, no output will be provided as the password is typed. If prompted to confirm, type y and press Enter.

  3. Open the “BM818 tool” application that was just installed.

  4. Note the modem firmware version (“FW version”).

  5. Check the “VoLTE enable” box if not already checked.

  6. Press Exit.

If you enabled VoLTE above, you can test it out by attempting to place a phone call. Refer to this guide if a firmware update is required.