At long last. My Omnia 2 is out of the service center. The upgrade firmware that pop-outs whenever I use the camera is gone for good. At first, they thought it was a software issue so I told them to look carefully coz I found the same issues in the internet and the only solution is to replace a chip or something in order for the camera to work. And when I got it, they told me that they have replaced a chip inside.
I checked if it is working in every possible situation and found the camera working great. Yes, I love my Omnia 2 once again.