How do I compress my mp3 files small enough to under 100kb each for my Smartphon

Tweet

How do I compress my mp3 files small enough to under 100kb each for my Smartphone? Actually I have been able to roll up 6-8 mp3's to my SMT5600 AudioVox smartphone, but the MP3s appear to be 1MB each, or at least that what it shows in properties on my phone. How do I take perhaps 100 songs and compress them under 500k onto my phone? I currently use Active Sync 4.1 from Microsoft which converts the files and rolls them up to your smartphone. Here is a link to the phone I currently have: http://reviews.cnet.com/audiovox_smt5600...