I am trying to remove the at&t from my (new) Xperia X10. I have installed universal android, superuser.apk, Titanium Backup, and Android Mate. when I try to uninstall the bloatware, my phone says the uninstall was unsuccessful. I have read that I should go to settings--applications-- and click unknown apps...the problem is that I do not have that option. I figure I can't be the first to run into this problem. Help!!!