.. include:: ../urls.rst

.. _l5_enable_volte:

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:

#. `Launch a terminal <docs_pureos_terminal_>`_.
#. Run the following command to install the BM818 modem tools:

   .. code-block:: bash

      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**.
#. Open the "BM818 tool" application that was just installed.
#. Note the modem firmware version ("FW version").
#. Check the "VoLTE enable" box if not already checked.
#. Press **Exit**.

If you enabled VoLTE above, you can test it out by attempting to place a phone call.
Refer to :ref:`this guide <l5_modem_reflash>` if a firmware update is required.