Hey
I have the 6680 :)
i have uploaded some games to it, but when tryin to upload themes from my pc via a data cable, the phone says

"Installation security Error.Unable To Install"

and says when tryin to get some apps to the phone, is there a option to turn off? or just wont let me?

Go To -> App.Manager -> Option-> Setting ->Software installation "on", Online certif.check "off"

Thanks alot :) CHeers babe