# Manage an Ongoing Conference Call

Once a conference call is underway in the Cloud Voice App, you can shape it on the fly: pull in more people, drop someone who no longer needs to be on the line, and control the microphones. Some of these controls are open to everyone on the call, while others are reserved for the host.

:::note
The host is the person who started the conference. A few actions in this guide (removing someone, and muting or unmuting other people) can only be done by the host. Any participant can add people and control their own microphone.
:::

## Add or remove participants

### Bring another participant into the call

Anyone on the conference can invite additional people to join, so you do not have to be the host to expand the call.

1. On the call screen, tap the add-participant button ![Add participant](/images/pbx/add-conference-members.png).
2. Choose the person you want to add, then tap **OK**.

   :::note
   - When the contact has more than one number on file, a prompt lets you pick which number to dial.
   - For an external number, tap the number itself to dial it as-is, or tap the prefix button ![Select outbound prefix](/images/pbx/select-outbound-prefix.png) first to apply an outbound prefix before the call goes out. An outbound prefix is a short dialing code, set up by your administrator, that decides which outside line or route the call uses.
   :::

The person you selected is called immediately. As soon as they answer, they are joined into the conference.

![Adding a participant to a conference from the Cloud Voice App call screen](/images/pbx/mobile-add-member-during-conference.png)

### Drop a participant from the call

Removing someone is a host-only action.

1. Tap the participant you want to remove.
2. In the window that opens, tap **Delete**.

The participant is disconnected from the conference right away.

:::caution
Tapping **Delete** takes effect at once, with no confirmation prompt, and it hangs up on that person. If you remove someone by mistake, the only way to bring them back is to invite them again with the add-participant button.
:::

![Removing a participant during a conference in the Cloud Voice App](/images/pbx/mobile-remove-member-during-conference.png)

## Mute and unmute

### Control other participants' microphones

Only the host can mute or unmute the other people on the call. If you do not see these options, you are not the host of this conference.

**Everyone at once**

1. Tap your own entry in the participant list.
2. Choose **Mute All** or **Unmute All**.

:::tip
Muting everyone at once is the quickest way to cut background noise and echo on a large call. Ask people to unmute themselves (see below) when they want to speak.
:::

![Muting all participants at once from the Cloud Voice App](/images/pbx/mobile-mute-all-conference-members.png)

**A single person**

1. Tap the participant you want to change.
2. Choose **Mute** or **Unmute**.

![Muting one specific participant in a Cloud Voice App conference](/images/pbx/mobile-mute-specific-conference-members.png)

### Mute or unmute yourself

Every participant can silence or reopen their own microphone at any time, regardless of whether they are the host.

Tap the microphone button ![Microphone](/images/pbx/microphone-fill.png) in the bottom-left corner of the call screen to toggle your mic on or off.

![Muting your own microphone during a Cloud Voice App conference](/images/pbx/mobile-mute-self.png)