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Convert MMF to M4R - Use Old Ringtones on iPhone

Transform legacy mobile ringtones into iPhone-compatible M4R format.

Step 1: Upload your files

You can also Drag and drop files.

Step 2: Choose format
Step 3: Convert files

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Old Phone Ringtones, New iPhone

You have MMF ringtone files from an old Samsung or feature phone that you want to use on your iPhone. The problem is iPhones only accept M4R format for ringtones, and they cannot play MMF files directly.

Converting MMF to M4R takes just a few seconds. Once converted, you can sync the ringtone to your iPhone and use those classic tones again. In our testing, MMF files from devices dating back to 2005 converted successfully to M4R format.

How to Convert MMF to M4R

  1. Upload your MMF file - Drag and drop or click to select your ringtone
  2. Convert to M4R - The conversion happens automatically in your browser
  3. Download your ringtone - Get the M4R file ready for your iPhone

After downloading, sync the M4R file to your iPhone using Finder (macOS Catalina+) or iTunes (older systems). The ringtone will appear in Settings under Sounds and Haptics.

Understanding the Formats

What is MMF?

MMF (Mobile Music File) is Yamaha's SMAF ringtone format, widely used on feature phones from 1999-2010. Samsung phones in particular used MMF extensively. These files contain synthetic audio created with FM or wavetable synthesis, and some include PCM voice samples. MMF files are very small, which made them ideal for phones with limited storage.

What is M4R?

M4R is Apple's ringtone format for iPhones. It is essentially an AAC audio file with a different extension. iPhone ringtones have a 40-second maximum length limit. M4R offers higher audio quality than MMF since it uses modern AAC compression rather than synthetic sound generation.

When to Convert MMF to M4R

  • Nostalgic ringtones - Keep using that ringtone you had for years on your old phone
  • Unique sounds - MMF files often contain distinctive polyphonic tones not found elsewhere
  • Archived collections - If you have a folder of old MMF files, convert them for modern use

If you need the ringtone in a more universal format first, consider converting MMF to MP3 which works on virtually any device.

Works in Any Browser

Convert MMF to M4R on any device:

  • Windows, Mac, Linux, Chromebook
  • Chrome, Firefox, Safari, Edge
  • iPhone, iPad, Android

No software installation required. The conversion runs entirely in your browser.

Pro Tip

After converting to M4R, check the file length. iPhone enforces a 40-second limit for ringtones. Most old MMF files are well under this, but longer ones will need trimming in GarageBand or another audio editor before syncing.

Common Mistake

Trying to sync M4R files by just copying them to iPhone storage. M4R ringtones must be added through Finder (Mac) or iTunes (Windows) and synced properly to appear in your ringtone list.

Best For

Bringing back classic ringtones from old Samsung or other feature phones. Perfect if you saved your favorite 2000s-era polyphonic ringtones and want to use them on your current iPhone.

Not Recommended

If you want a ringtone for Android, convert to MP3 instead. M4R only works on iPhone. Also unnecessary if you can find the same ringtone already in M4R or M4A format online.

Frequently Asked Questions

MMF (Mobile Music File) is Yamaha's SMAF ringtone format used on feature phones from 1999-2010. Samsung phones commonly used this format. MMF files contain synthetic audio using FM synthesis, wavetable synthesis, or PCM samples.

M4R is Apple's ringtone format for iPhones. It uses AAC audio compression and has a maximum length of 40 seconds. M4R files are essentially renamed M4A audio files with the .m4r extension that tells iOS to treat them as ringtones.

Connect your iPhone to your Mac or PC. On macOS Catalina or later, open Finder, click your iPhone, and drag the M4R file into the window, then sync. On older systems or Windows, use iTunes to sync the ringtone. It will appear in Settings > Sounds & Haptics.

The audio content is preserved, but the quality may actually improve. MMF used older synthetic sound generation while M4R uses modern AAC compression. The melody and timing remain the same.

iPhone ringtones can be up to 40 seconds long. If your MMF file is longer than 40 seconds, you may need to trim it after conversion. Most MMF ringtones are already short enough to fit within this limit.

Yes. Upload multiple MMF files and convert them all to M4R in one batch. This is useful if you have a collection of old ringtones you want to use on your iPhone.

MMF files were much smaller than MP3 files and required less processing power to play. Feature phones had very limited storage and battery life, making the efficient MMF format ideal for that era.

Yes, completely free. No registration, no watermarks, no limits on conversions. The entire process runs in your browser without uploading your files to any server.

M4R is specifically for iPhone. For Android, convert your MMF to MP3 instead, then set the MP3 as your ringtone through your phone's settings. Android accepts most standard audio formats as ringtones.

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