---
title: "Phone Calls – Telephony"
slug: "phone-calls-telephony-3"
updated: 2026-07-16T19:30:10Z
published: 2026-07-16T19:30:10Z
canonical: "documentation.prc-saltillo.com/phone-calls-telephony-3"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://documentation.prc-saltillo.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Phone Calls – Telephony

> [!WARNING]
> **Important:**
> 
> - You must be using the Unity AAC app on a non-dedicated device. If you are using a dedicated device, you will not be able to use the phone functionality.
> - You and each person you call must have a FaceTime account.

During a phone call, the usual spoken voice in the app will switch to a Phone/FaceTime voice. When you end the call, the spoken voice will switch back to your usual voice in the app.

#### To select or change your phone voice:

1. In Unity AAC, select **Menu > Settings** and scroll to the Speech section. Select **Phone/FaceTime Voice** to open a list of available voices. The voice currently selected displays a checkmark.
2. To change the voice, select the play icon to hear how a voice sounds. Listen to several voices if necessary.
3. When you find the voice you want, select the Apple ![](https://cdn.document360.io/7e1d5036-9a43-443d-8ea7-a17280ea302d/Images/Documentation/phone-calls---telephony-image-5k82gbhn.png?sv=2026-02-06&spr=https&st=2026-11-03T04%3A55%3A18Z&se=2026-11-03T05%3A55%3A18Z&sr=c&sp=r&sig=KQmTj7h11ANwhX1c6H7QBtPRFy9mn%2F5jk62QPH8AnC0%3D) icon to download and install it.

> [!NOTE]
> **Tip:** If you want to see words highlighted in the Speech Display Bar (SDB) as they are spoken during a telephony call, see [Highlight Spoken Words during Phone Calls/FaceTime](/documentation/docs/speech-display-bar-sdb-1#highlight-spoken-words-during-phone-callsfacetime).