[Sample included] We recommend using an AI app to change the voicemail voice! A thorough explanation of how to create a response message

Oct. 27, 2025

[Sample included] We recommend using an AI app to change the voicemail voice! A thorough explanation of how to create a response message
I want to change the voice of my answering machine's greeting message!
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When you make a call, you may hear a message on your answering machine .

You can change the voicemail on your smartphone or business phone to whatever you like.

In fact, you can easily create answering machine greeting messages using an AI voice synthesis service .

This article explains in detail how to change the voicemail greeting on your answering machine .

In addition to changing the voice on your iPhone, we also introduce how to set up voicemail for each carrier, such as docomo, au, SoftBank, and Rakuten Mobile, as well as sample sentences that you can use right away.

If you want to change the voice message on your answering machine, why not use this article as a reference to set it up for free ?

[Free] The latest AI voice synthesis service recommended for changing your answering machine voice

Ondoku

If you want to change the voice of your answering machine's greeting message, we recommend "Ondoku" !

"Ondoku" is a free AI service that uses the latest speech synthesis engine to allow anyone to easily create reading voices .

It is a web application that can be used from a browser, so it is easy to use without installation .

It can be read aloud in a wide range of voices, including female and male voices (Japanese voice samples are available here) .

The latest AI technology allows it to read messages in a clear, easy-to-listen voice , making it perfect for answering machine greetings.

It can be used not only for business phones, but also for the iPhone's standard answering machine and answering messages for carriers such as docomo, au, SoftBank, and Rakuten Mobile.

What's more, Ondoku allows you to create answering machine greeting messages for free!

When using for free, please include a message at the end of the audio stating that you are using Ondoku.

For commercial use, you will need to sign up for a paid plan (for more information on commercial use, click here) .

If you want to change the voice of your answering machine's answering message, why not try using "Ondoku" ?

[Free] Explaining how to create answering machine message using the latest AI

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I want to create an answering machine greeting message using AI!

If you want to create a greeting message for your answering machine, we recommend the AI voice synthesis service "Ondoku."

With "Ondoku," you can change the voice for free by having your response message read out in a female or male voice.

Now, let's explain how to create a response message that can be used on iPhone, docomo, SoftBank, and Rakuten Mobile.

1. Write a Script for Your Answering Machine Greeting Message (with Sample Text)

Write a script for your answering machine greeting

First, create the script text for the response message to be read aloud by Ondoku .

The key is to make the response message concise and easy to understand.

You can use any software or app, such as Notepad or Word.

We will introduce some sample answering machine message examples , so please use them as a reference and write the message that is perfect for you.

Sample personalized answering machine greetings

When changing the answering machine message on your personal smartphone, we recommend keeping it simple, like this sample message.

I'm not available to answer the phone right now. Please leave a message after the beep.

Sample answering machine message for after-hours calls

Your answering machine's greeting message is an important factor in determining the first impression your caller has on you.

When changing the voice message on your answering machine using an IVR system or business phone in a store or office, we recommend using polite and easy-to-understand content, like this sample sentence.

Thank you for calling. This is XX Co., Ltd. We are currently closed. Our business hours are from 9:00 AM to 6:00 PM on weekdays. We apologize for the inconvenience, but please call again during business hours.

Sample answering machine message for closed days

To provide more personalized service, we recommend creating separate response messages for calls outside of business hours and for closed days.

For example, we recommend this sample sentence.

Thank you for calling. This is XX Co., Ltd. We are very sorry, but today is our regular holiday. Our store is closed every Wednesday and the third Thursday of every month. We are open from 10:00 AM to 7:00 PM on business days. We apologize for the inconvenience, but please contact us again on a business day.

Sample answering machine message for temporary closure

By using an AI voice synthesis app, you can quickly prepare audio even in the event of a sudden closure.

Why not try creating your own audio using the sample sentences as a reference?

Thank you for calling. This is XX Co., Ltd. We apologize for the inconvenience, but due to circumstances, we will be closed today. We will resume normal business hours tomorrow, XX/XX. Thank you for your understanding.

Sample answering machine messages for the New Year holidays

Even if you are closed during the New Year holidays, we recommend using answering machine greeting messages like the sample sentences below.

Thank you for calling. This is XX. We would like to inform you about our business hours over the New Year holidays. We will be open until 5:00 PM on December 28th this year. We will reopen at 10:00 AM on January 5th in the new year. We will reopen on XX/XX in the new year. We look forward to your continued patronage this year. We wish you all good health and happiness.

Sample Obon answering machine message

Here are some sample sentences for Obon holiday closures.

Thank you for calling. This is XX Co., Ltd. We apologize for the inconvenience, but we will be closed from August XX to August XX for the summer holidays. We will resume normal business hours from August XX. We apologize for any inconvenience caused and appreciate your understanding.

Sample answering machine message for renovations and construction

If renovations or construction work are underway, you can receive guidance via a response message.

For example, we recommend this sample sentence.

Thank you for calling. This is XX Co., Ltd. We apologize for the inconvenience, but due to store renovations, we will be closed from XX/XX to XX/XX. We will resume normal business hours from XX/XX. We look forward to seeing you again. We apologize for any inconvenience caused and appreciate your understanding.

2. [Free] Read out your answering machine message with "Ondoku"

Once you write the script text for your answering machine message, Ondoku will read it out loud for free .

The free AI voice synthesis app "Ondoku" is very easy to use.

First, open the "Ondoku" homepage.

Ondoku

Paste the script text into the text box on the top page.

Paste script text

As an example, we will read out a personal answering machine message from a sample sentence.

Since this is a free reading, we have added a message to the end of the script stating that it is being read by Ondoku .

Select the language and audio.

Select language and audio

For Japanese, you can choose from over 16 different voices, including male and female! (Click here for voice samples)

This time, we will use "Nanami (Guide)", which is ideal for answering machine answering messages.

Ondoku allows you to adjust the reading speed and pitch of the voice, but when reading for the first time, you can leave it at the default settings.

Now you're ready.

Ready

Press "Read Aloud" to start the free speech synthesis .

The latest AI allows for voice synthesis in just a few seconds .

Speech synthesis completed

The screen will change and the audio player will be displayed.

When the script text was read aloud, the following voice was generated.

If you listen to the preview and there are no problems, press the "Download" button to save the MP3 audio file .

*You can also download it in WAV format from the history page.

Now you can use Ondoku to synthesize voice messages for your answering machine for free.

3. Change the voice message of your answering machine

Change the voice message for your answering machine

Finally, use the audio file you created to change the voicemail greeting.

How to change the voice of your IVR system, cloud PBX, or business phone

For IVR systems in stores or offices, cloud PBXs, and business phones , you can directly load MP3 or WAV files to change the voice of your answering machine's greeting message.

Simply open the answering machine settings from the admin panel and upload the MP3 or WAV file you created .

You can set the answering machine's answering message to match your company's image, such as a female voice or a male voice.

IVR systems, cloud PBXs, and business phones can load audio files directly, so you can easily change the voice using an AI reading app.

Please also take a look at this article which explains the voice of IVR systems.

How to change the voice settings on iPhone, docomo, au, SoftBank, and Rakuten Mobile

If you are using the standard iPhone feature or a carrier's answering machine service such as docomo, au, SoftBank, or Rakuten Mobile , you can change the answering message on the settings screen or in the phone guidance .

Even if your phone does not have the ability to directly upload audio files, you can change the audio by playing the audio file on your smartphone or computer and recording it using the answering machine's recording function.

*In the second half of this article, we will introduce how to change the voice settings for iPhone, docomo, au, SoftBank, and Rakuten Mobile.

In this way, anyone can easily create answering machine greeting messages for free using the AI voice synthesis service "Ondoku" !

If you are using it for personal use, you can use it for free as long as you include "I am using Ondoku" in the audio !

For commercial use, you will need to sign up for a paid plan (for more information on commercial use, click here) .

No installation is required and you can start reading right away , so why not try out Ondoku 's AI reading for free ?

How to change the voicemail greeting on your iPhone

How to change the voicemail greeting on your iPhone

From here, we will explain how to change the voice on your iPhone and how to change the voice on the answering machine services of docomo, au, SoftBank, and Rakuten Mobile.

First, here's how to change the standard voicemail sound on your iPhone .

How to change the voicemail greeting on your iPhone

To change the voicemail greeting on your iPhone , first open the Phone app .

The process from this point onwards differs depending on whether you are using the integrated layout or the classic layout.

How to change the voice when the iPhone phone app is in the integrated layout

If your iPhone's Phone app is using the integrated layout , first tap "Edit" on the "Calls" screen.

On the "Edit" screen, tap "Edit voicemail greeting ."

On the opened screen

"Custom" → "Recording"

Tap to record a greeting.

You can change the voice of the response message by playing the audio file you created on your PC or smartphone and recording it on your iPhone .

How to change the voice when using the iPhone Phone app in the classic layout

If your iPhone's phone app is using the classic layout (where the bottom is divided into "History," "Contacts," etc.) , first tap "Voicemail."

Tap "Answering Message" in the top right corner of the "Voicemail" screen to open the menu.

In the menu that opens

"Custom" → "Recording"

You can record a greeting by tapping .

You can change the voice of your response message by playing the audio file you created on your PC or smartphone and recording it on this screen .

You can easily change your iPhone's answering machine greeting message using the Phone app.

As you can see, you can easily change your iPhone's answering machine greeting message within the Phone app .

This is a recommended feature for iPhone users, as it is easier to change than the answering machine services offered by mobile phone carriers such as docomo, au, SoftBank, and Rakuten Mobile.

[Each carrier] How to change the voice settings for docomo, au, SoftBank, and Rakuten Mobile

How to change the voice settings for docomo, au, SoftBank, and Rakuten Mobile

Next, we will explain how to change the voicemail greeting for each carrier: docomo, au, SoftBank, and Rakuten Mobile .

How to change the answering message voice of Docomo's answering machine

If you are using a Docomo mobile phone line, you can change your answering machine greeting by calling Docomo's automated answering number .

At this time, make sure that the audio file you created can be played on a computer or another smartphone.

  1. Open the phone app and call docomo's voicemail service number "1416".
  2. An automated reply message will play, so press "9" (Change service details).
  3. When the following automated response message is played, press "2" (to confirm or change the response message).
  4. When the next automated message plays, press "2" (record in your own voice).
  5. You can then record a response message after the beep.
  6. Play an audio file on your computer or another smartphone and record your greeting.
  7. When you're done recording, press "#" to end the recording.
  8. The recorded content will be played, so check it and if there are no problems, press "1" (you can record again by pressing "2").
  9. A guidance voice will be played, so press the " " " " "End call button to end the call.

In this way, you can change the answering message voice on docomo's answering machine service.

With docomo, you can record up to 3 minutes .

How to change the voice message on your au answering machine

If you have subscribed to the "Answering Service EX" on your au mobile phone line, you can change the voice of your answering message.

To change the answering message for Answering Service EX , call the au automated answering number from your phone app.

At this point, make sure that the audio file you created can be played on a computer or another smartphone.

  1. Using your phone app, call au's voicemail service number "1414."
  2. When you hear the automated message, press "1."
  3. Press "1" for the next automated message.
  4. Recording will begin, so play the audio file on your computer or another smartphone and record your response message.
  5. When you're done recording, press "#" to end the recording.
  6. An automated message will be played, so press "#".
  7. Press the end call button to hang up the call.

In this way, you can change the voice of the answering message with au's "Answering Service EX."

With au, you can also record for up to 3 minutes.

How to change the voice message on SoftBank's voicemail

If you want to change the voicemail greeting on your SoftBank mobile phone line, you can do so by calling SoftBank's automated answering number from your phone app.

First, make sure the audio file you created can be played on a computer or another smartphone.

  1. Using your phone app, call SoftBank's voicemail service number "1416."
  2. When you hear the automated response message, press "2" (Change service settings).
  3. When the following automated response message is played, press "3" (record/delete/play original response message).
  4. At the next automated response message, press "3" (record your own response message).
  5. Recording will begin after the beep, so play the audio file and record your greeting.
  6. When you're done recording, press "#".
  7. An automated answering message will be played, so press "9" (to register the recorded message).
  8. Press "#" to register the registered voice as the response message.
  9. When the automatic response message is played, press "2" (Set response message).
  10. When the next automated response message plays, press "2" (make it your own response message).

You have now changed the voice of your SoftBank answering machine's answering message.

With SoftBank, you can record up to one minute.

How to change the voice message on Rakuten Mobile's voicemail (for businesses)

If you are using Rakuten Mobile for personal use, you can only use the standard response messages provided.

If you have a corporate contract, you can change the voicemail greeting using the Rakuten Link Office app .

  1. First, open the Rakuten Link Office app.
  2. Tap "Settings" from the menu.
  3. In Settings, tap Calls and Messages.
  4. Under "Calls and Messages," tap "Voicemail Settings."
  5. Under "Voicemail Settings," tap "Recorded Voice."
  6. The recording screen will open.
  7. Press the microphone button on the recording screen to start recording.
  8. Play an audio file on your PC or another smartphone and record it.
  9. Tap the microphone button to stop recording.
  10. Enter a name for your greeting and save the recording.
  11. Tap Finish Recording.

You can now change the voicemail greeting using Rakuten Mobile's Rakuten Link Office app.

Explaining the recommended points when creating an answering machine greeting message

Explaining the recommended points when creating an answering machine greeting message

When creating a greeting message for your answering machine, it's a good idea to keep a few things in mind.

Here are some tips for creating a message for your answering machine.

What to consider when choosing a voice: The characteristics of female and male voices

When creating an answering machine greeting message, it's important to choose between a female voice or a male voice .

Each has different features, so it is recommended to use them according to the application and purpose.

A woman's voice is soft and friendly

A woman's voice has the advantage of being soft and friendly .

Female voices are especially recommended for answering machines in the hospitality and service industries .

By choosing a female voice, you can create a warmer response message.

Ondoku also offers a wide variety of female voices.

For example, the female voice "Nanami (Guide)" is ideal for announcements and is perfect for changing the voice of your answering machine's greeting message.

If you're unsure about the type of voice, we recommend choosing a female voice .

Male voices are characterized by a sense of trust and stability

A male voice is known for its ability to convey a sense of trust and stability .

A male voice is recommended for answering machines in highly specialized industries such as law firms and consulting companies .

Ondoku also has a wide variety of male voices available , so you can create response messages in male voices to suit your business needs.

It is also recommended to choose female or male to match the company's brand image.

It is also recommended to choose a female or male voice to match your company's brand image .

If your company is young and vibrant, we recommend a bright female voice.

For formal businesses, a calm, low-pitched male voice is best.

Ondoku has many female and male voices available.

Please take a look at this article for audio samples.

It is recommended that the response message not be too long.

One thing to be careful about when choosing an answering machine message is to make sure it isn't too long .

Carriers such as docomo, au, and SoftBank allow you to record for up to 1 to 3 minutes, but it is actually recommended to keep it shorter .

The optimal length of an answering machine message is about 15 to 30 seconds.

Callers want to get their message across quickly, so a long response message can be stressful.

When thinking about the content of your response message, it's best to keep it short and provide the necessary information .

If you have an answering machine in a store or office ,

  • Company Name
  • Current situation (outside business hours, temporary closures, etc.)
  • Opening hours

It is recommended to convey the following:

For personal answering machines

  • Absence
  • To contact you back

It's OK if you just tell them.

Using the AI voice synthesis app "Ondoku," you can create response messages as many times as you like , so we recommend creating various response messages and listening to them .

Why not try changing the voice message on your answering machine using the latest AI?

In this way, you can easily create answering machine greeting messages using the AI voice synthesis app "Ondoku."

You can choose your preferred voice, such as a female voice or a male voice , to create a response message that is easy to hear.

With business phones and IVR systems, you can easily change the voice by loading an audio file.

You can also change the response message to your liking on iPhone, docomo, au, SoftBank, and Rakuten Mobile.

If you want to provide detailed service in your store or office, we recommend creating response messages using the latest AI.

Why not try creating your own free answering machine greeting message with the AI reading app "Ondoku" ?

■ AI voice synthesis software "Ondoku"

"Ondoku" is an online text-to-speech tool that can be used with no initial costs.

  • Supports approximately 50 languages, including Japanese, English, Chinese, Korean, Spanish, French, and German
  • Available from both PC and smartphone
  • Suitable for business, education, entertainment, etc.
  • No installation required, can be used immediately from your browser
  • Supports reading from images

To use it, simply enter text or upload a file on the site. A natural-sounding audio file will be generated within seconds. You can use voice synthesis up to 5,000 characters for free, so please give it a try.

Text-to-speech software "Ondoku" can read out 5000 characters every month with AI voice for free. You can easily download MP3s and commercial use is also possible. If you sign up for free, you can convert up to 5,000 characters per month for free from text to speech. Try Ondoku now.
HP: ondoku3.com
Email: ondoku3.com@gmail.com
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"Ondoku" is a Text-to-Speech service that anyone can use for free without installation. If you register for free, you can get up to 5000 characters for free each month. Register now for free