I upgraded from a Desire which I had no trouble with managing my music on using HTC sync manager software and a file on my PC called phone playlist, which I just added and deleted music from. When setting up the One X ,Sync manager told me to download the latest Sync Manager for the One X which I did. I now have every track (1200) duplicated on the phone, with no way to delete them except by manually deleting each one. I tried deleting some and then doing a sync and they came back as duplicates. Does anyone know how to delete all music from my phone, and how to stop the duplication happening?