Hello, After much frustration and many false alarms, I updated the ums firmware in my IFP 799. Please please be advised that the ums file for the 899 is not the same as that for the 799. The Iriver page is rather difficult to navigate, and I want to say to any 799 user who is reading this that if you need the correct ums firmware, please write me at: donald_roberts_99@xxxxxxxxx and I'll be glad to send you the correct file. Don Roberts