# Enable or Disable Car Bluetooth

When Car Bluetooth is turned on and your phone is paired with your vehicle, incoming Cloud Voice App calls surface on the car's display, letting you answer or end them straight from the in-car controls. Use the setting below to switch this behavior on or off whenever you like.

:::note
Car Bluetooth is available in the Cloud Voice App for Android only.
:::

## Enable Car Bluetooth

:::note
The Car Bluetooth control is the switch labeled **Allow GSM calls during calling**. GSM (Global System for Mobile Communications) is your phone's normal cellular network, so this toggle lets your car's controls handle Cloud Voice App calls the same way they handle regular mobile calls.
:::

1. On the **Calls** page, tap your account in the top-left corner.
2. Go to **Settings > Advanced**.
3. Turn on the **Allow GSM calls during calling** switch.

   ![Advanced settings with the Allow GSM calls during calling switch turned on](/images/pbx/car-bluetooth-enabled-1.png)

4. In the confirmation prompt, tap **OK**.

Once your phone is connected to the car over Bluetooth, any incoming call to the Cloud Voice App is mirrored on the car screen, so you can pick up or hang up without touching your phone.

:::caution
A few phone models don't fully support this feature and may run into problems such as one-way audio during a call.
:::

## Disable Car Bluetooth

1. On the **Calls** page, tap your account in the top-left corner.
2. Go to **Settings > Advanced**.
3. Turn off the **Allow GSM calls during calling** switch.

   ![Advanced settings with the Allow GSM calls during calling switch turned off](/images/pbx/car-bluetooth-disabled-1.png)