# Call Audio Routing on iPhone: How It Works

URL: https://byshahid.com/blog/call-audio-routing-iphone/
App: Secret Codes: IMEI & Carrier (https://apps.apple.com/us/app/secret-codes-imei-carrier/id6807154322)
Author: Muhammad Shahid
Updated: 2026-11-04

> Force calls to speaker or a headset automatically. Sets where call audio goes by default: the earpiece, the speaker, or a connected Bluetooth device. Setting it to Speaker permanently is a practical workaround for a failing earpiece speaker while you wait for a repair.

- **What it does:** Force calls to speaker or a headset automatically.
- **Published for:** any iPhone
- **Type:** iOS setting

Force calls to speaker or a headset automatically. This page explains what it does, how to use it on an iPhone and which carriers it applies to.

I build **Secret Codes: IMEI & Carrier**, a free iPhone app with 317 checked codes and guides, including this one. If you would rather tap than memorise, [get Secret Codes on the App Store](https://apps.apple.com/us/app/secret-codes-imei-carrier/id6807154322).

## What is Call Audio Routing?

Sets where call audio goes by default: the earpiece, the speaker, or a connected Bluetooth device. Setting it to Speaker permanently is a practical workaround for a failing earpiece speaker while you wait for a repair.

## How do I do it?

- Open the Settings app.
- Tap Accessibility, then Touch.
- Tap Call Audio Routing.
- Choose Automatic, Bluetooth Headset or Speaker.

## Which carriers does this apply to?

| Published for | any iPhone |

| Type | iOS setting |

| Good to know | Available on every iPhone under Accessibility. |

_Screenshot: The Secret Codes detail screen shows the steps, the carriers and an Open in Phone button._

## Related iphone calling features

- [Announce Calls](/blog/announce-calls-iphone/)
- [Auto-Answer Calls](/blog/auto-answer-calls-iphone/)
- [Emergency SOS via Satellite](/blog/emergency-sos-via-satellite-iphone/)
- [RTT and TTY](/blog/rtt-and-tty-iphone/)
- [Emergency SOS](/blog/emergency-sos-iphone/)
- [Dial Assist](/blog/dial-assist-iphone/)

See all [iphone calling features](/blog/iphone-codes/iphone-features/) or [every category of iPhone codes](/blog/iphone-codes/).

## How Secret Codes helps

Secret Codes keeps this and every other entry a search away. Pick your carrier once and each entry says whether it is published for your line. You can save favourites, add a private note, and record whether a code worked on your line.

**Secret Codes: IMEI & Carrier** is free on the App Store: https://apps.apple.com/us/app/secret-codes-imei-carrier/id6807154322

## FAQ

### What is Call Audio Routing on iPhone?

Force calls to speaker or a headset automatically. Sets where call audio goes by default: the earpiece, the speaker, or a connected Bluetooth device. Setting it to Speaker permanently is a practical workaround for a failing earpiece speaker while you wait for a repair.

### What are the steps for Call Audio Routing?

1. Open the Settings app. 2. Tap Accessibility, then Touch. 3. Tap Call Audio Routing. 4. Choose Automatic, Bluetooth Headset or Speaker.

### Where do I find Call Audio Routing?

In the Settings app on your iPhone.

### Is there a dial code for Call Audio Routing?

No. On iPhone this is not a dial code, so you use the steps on this page instead.

### Which carriers does Call Audio Routing work on?

It is published for any iPhone. Available on every iPhone under Accessibility.

### Does Call Audio Routing work on Android phones too?

These steps are for iPhone. Android phones have their own menus.

### Will Call Audio Routing work outside the US?

The iPhone steps stay the same, although some features depend on your carrier and region.

### What if Call Audio Routing does not work on my iPhone?

Check that it applies to your carrier first, because carriers decide which services they offer and can change them. If it should apply to your line, contact your carrier.

### What is related to Call Audio Routing?

Announce Calls. Have Siri read out who is calling.

### What else is in this category?

Auto-Answer Calls. Pick up automatically after a set delay.

### Can I find Call Audio Routing in an app?

Yes. Secret Codes, a free iPhone app, includes it with its steps and carrier details.

### Can I save Call Audio Routing for later?

Yes. In Secret Codes you can save it to your favourites and add a private note, which stays on your iPhone.

## Sources

- [Apple Support: iPhone User Guide](https://support.apple.com/guide/iphone/welcome/ios)