now working ? if not then sc otherwise wait for it to SD... i dun think they accept phone near SD because no proof.

SD = sudden death = motherboard kaput 

yes... must be something wrong with the phone then they will check otherwise they say your phone is working 'fine' me also own 2 unit 1 batch of S3 also can't do anything because the phone is working at the moment. just hope it kaput b4 warranty over or kaput in 2 to 3 year time 

when did you buy your phone? and unfortunately, SD means sudden death = your phone is dead. Right now it is still working.. If you have a lot of free time, you can try to go to the SC and ask them whether they can change it for you. But I highly doubt they will.

BL!Tz^_^
IMHO, it would be a help if you can sort of show or replicate the problem to the Samsung Service center staff. I had a post in the previous thread for my case where I got the motherboard replaced on that day itself. I wrote down in problem description that I had already flashed 4.0.4, 4.1.1 and 4.1.2 with no apps but freezing still happens (I also played with phone while waiting until it frozed and showed to the service center staff.

Failing that, maybe you can take a video of the phone when it has (I don't know if it helps but someone on XDA had tried it and it succeeded for his case)

All the best, good luck.

From my experience with 1U SC, no need to show proof.  Just describe the problem, they will flash official firmware for you first.  If still face problem, they will replace motherboard.
Lowyat Samsung SC closed for renovation, only handles pickup, no repair items accepted.
In a way, it is true.  The white and blue were launched first, and blue had some problems with delayed stock, so white sold the most.  And this mobo problem was prevalent with the earlier batches, so indirectly white is most affected.

BTW, on an unrelated note, I went to 1U Samsung and tested all the S3 demo units (about 6 or 7, all sorts of colours).  All of them had HW Rev MP 1.100.