I got a micro SD card for my phone and had some issues. With mp3 files the phone would turn off. I converted the files to WMA as that is the compatible format and it stopped shutting off and I can see the files unlike before. When trying to play them I get a player error message saying said file cannot be played. Can anyone help me with how to play/encode my mp3 files on my phone? I only have a card and card reader, no usb hookup for my phone.