I just have my 8320 for a couple of days and was only getting lower case uma or edge. Finally, yesterday I called back T-Mo and their PDA support told me that to get upper case UMA, I need to add an optional feature call BB Feature Enabler(Free). After I added that for free, UMA has been fantastic on my 8320 ever since. If anyone runs into same problem w/ uma only then try this and confirm.