tips
Laura's phone lets you use MP3s as ring tones, but it only accepts .mmf or .amr files (at least, it doesn't take .mp3 or .wav) for other sounds, such as reminder alarms and voice mail alert tones.
after trying some other methods that didn't work, here's how to make make .mmf (SMAF) ringtones that will actually work on the samsung sync (A707) phone:
0. download Yamaha's free WSD "Wave Sound Decorator" (for Windows) and install it.
1. create your desired ring tone as a .wav file.
Note: it's best to make it monaural. also apply "compression" if you can. i use audacity for audio recording and editting.
2. run WSD and drag your .wav file onto it.
3. select "MA-5" in the drop-down box on the toolbar (upper left).
4. if the sample rate in the status bar (bottom right) is above 24000 Hz, click "Edit" and "Sample Type" then resample to 24000. (in the process, check "convert to mono" if it's not grayed out.)
Note: WSD can also normalize, trim, and fade in/out if you didn't do all that in step 1.
5. save it, (it saves only as .mmf format.) put it on the phone and use it.
ringtones on the Samsung A707 are limited to a file size of 300kB, which for a 19.4 second (that's how long her phone rings before voicemail picks up) mono MP3 requires you to use 112kbps (or less, or VBR).
alarm tones aren't subject to the 300kB limit. reminder alarms sound for 60 seconds or until acknowledged, and the phone allows you to use 60s of 16bit mono .mmf audio at the highest allowed sample rate, 24000Hz.