Instructions on how to properly convert audio files to a low quality meant for phones.

Once you record the voicemail on this website: if it doesn't work try this out:

If the voicemail file quality is high, these instructions should help you make it compatible to more carriers:

1. go to and upload the voicemail file  

2. Convert to ECONOMY 64kbps MP3  

3. Upload it back to the voicemail step

If it's still not working, you can try to convert the file further here:

You'll need to get audacity

You'll need to get LAME


1. Drag and drop your audio file into audacity

2. On the bottom left, lower the project rate down to 8000

3. Tracks -> Resample... -> 8000 -> OK

4. File -> Export Audio... -> Name the File in the Save As-> Format: Other uncompressed files -> Options -> Header: WAV -> Encoding: U-Law -> OK -> Save -> OK