Default [Q] GT-N7105 Optus can upgrade to 4.4.2 with Nordic Rom?

Hi All,

Here is my device info.
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GT-N7105
Baseband: N7105XXUEMK3
Kernel: 3.0.31-2138564 dpi@DELL134#1
Build No: JSS15J.N7105XXUEMKA
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Its region code is Optus (Australia). As Samsung said Note II can upgrade to Kitkat but the OTA always shows "This is the latest firmware"

I wonder how I can upgrade to Kitkat with Nordic stock rom? If so, are there any important steps before flashing this rom?

Pls help me