Chiptune forum

Alright, I'm not sure where else to turn. My friend and I have been in game development for awhile and always enjoyed chiptunes for our soundtracks. We're trying to get into mobile phone development and I figured chiptunes would work best - they're tiny in size and sound nostalgic. Phones don't support any chiptune formats, of course, so conversion is necessary. When converting to say .wav so that a phone can handle it, the file size jumps from what might originally be 30kb to 15.5[[mb]]. We have to keep the [[entire]] game file size below 280[[kb]].

So... I dunno if any of you guys work with this type of stuff, but any ideas on how to get chiptunes to play on a phone and keep the size around what it was originally?