Active Call Controls on the Mobile App

Learn how to manage active calls on the net2phone mobile app using in-call controls such as mute, hold, dialpad, audio selection, call transfer, and 3-way calling.

Written By Sara Mosher (Super Administrator)

Updated at March 23rd, 2026

In this Article:

Choose the right call action Mute yourself on a call Access the dialpad during a call Change audio source during a call Place a call on hold Handle call waiting Call waiting notification End and accept Hold and accept Merge calls (3-way conference) Start a 3-way call End or manage a 3-way call

While on a call, the mobile app provides several in-call controls that allow you to manage the conversation, add participants, or adjust your audio settings.

Choose the right call action

The mobile app provides several ways to manage active calls. Use the table below to choose the correct action.

If you want to...	Use this feature
Temporarily silence your microphone so others cannot hear you	Mute
Pause the conversation temporarily	Hold
Add another participant to the call	Merge (3-way call)
Send the caller to another person	Transfer

Mute yourself on a call

You can mute your microphone during a call if you need to prevent the other participant from hearing you.

Mute notes

Muting a call disables your microphone only.
You will still be able to hear the other participant.
The mute indicator will appear on the call screen while muted.

While on an active call, select the Mute button.
Select Mute again to unmute yourself and resume speaking.

Access the dialpad during a call

Use the dialpad during a call when you need to enter numbers, such as navigating automated phone menus or entering extension numbers.

Dialpad notes

Dialpad entries send DTMF (Dual Tone Multi-Frequency) tones to the call.
Dialpad access is commonly used for IVR (Interactive Voice Memo) menus, extension dialing, or conference PINs.

While on an active call, select the Keypad or Dialpad button.
Enter the numbers required for the system or extension you are dialling.

GIF Example: Access keybpad during an active call.

Change audio source during a call

You can switch the audio source during a call to use your device speaker, Bluetooth headset, or another connected audio device.

Audio device notes

Available audio options depend on the devices currently connected to your phone.
Bluetooth headsets or earbuds must already be connected to appear as an option.

While on an active call, select the Audio or Speaker button.
Select the audio device you want to use.
Success: The call audio will switch to the selected device.

Example: Audio options accessed while on an active call from the topbar menu, with phone audio source selected.

Place a call on hold

You can place an active call on hold to pause a conversation temporarily.

Call hold notes

When a call is on hold, the other participant cannot hear you.
The call remains active until you either resume the call or end it.
You can place a call on hold before transferring a call or starting a 3-way call.

To place an active call on hold:

While on an active call, select the Hold button.
The call will be placed on hold.

To resume a call on hold:

Select the Resume or Hold button again.
The call will reconnect and continue normally.

Handle call waiting

If you receive another call while you are already on a call, Call Waiting allows you to manage both calls without disconnecting the first caller.

Call waiting notification

When a second call comes in, the Sync mobile app will alert you based on your device settings (sound, vibration) and display options, and will either end your current call or place it on hold before answering the new call.

End and accept

Ends your current call and immediately answers the incoming call. Use this option when the new call is more urgent or when you no longer need to continue the current conversation.

Hold and accept

Places your current call on hold and answers the incoming call. The original caller remains on hold until you return to that call, allowing you to briefly handle another call without disconnecting the first caller.

Note: While a call is on hold, the other caller cannot hear you until you resume the call.

Example: Mobile app featuring an incoming call while on an active call.

Merge calls (3-way conference)

Use the Add a Call and Merge options to set up a 3-way call in the mobile app.

3-way calling notes

When you add a second call, the original call is automatically placed on hold.
The Merge button appears only after the second call is answered.
selectping End Call during a merged call ends the call for all participants.

Start a 3-way call

Follow the steps below to merge two active calls into a 3-way conversation.

While on an active call, select Add a Call.
Choose the second participant:
1. Select a contact from your contact list, or
2. Enter an external phone number.
When the second call is answered, select Merge.
Both calls will combine into a single 3-way call.

End or manage a 3-way call

select End Call to end the call for all participants.
select the info icon to view each call and end them individually.

Example: Four screenshots from the mobile app while merging two calls into a 3-way conference.

Transfer a Call on the Mobile App

The Transfer option allows you to send an active call to another contact or phone number.

During a call, select Transfer, then choose whether to perform an Immediate transfer or an Announced transfer.

For full instructions, see Transfer a Call on the Mobile App.

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