Our lovely app that downloads mp3s from our server into a local file on the phone then plays from that file was rejected for using too much bandwidth.
I understand t
YOu could not download the mp3 unless you are on wireless, and inform them of that. If you the mp3 are too important, then just tell them it only works on wireless, or include a few mp3 on the device. But 30min of mp3 is ridiculous, that is about what, 30meg.... think about it, 30 meg is just too much.