Ok. I give up. Tried tons of countries cda. None worked. Thus far only singapore and sweeden seemed to be working, but still failed half way thru the installation process. I guess, i just use pc companion, but wont update til the "one click" root ...
Here is ftf for C6833 LTE Europe 14.3.A.0.681 4.4.2
Here is FTF link
Singapore Generic FTF for C6833 LTE
I've followed the instruction but I got bootlop now. I can not turn the phone off at the moment. Please help :(
Mine is C6802
Press power and volume up together to force shutdown.
And follow procedure as per OP....