To use HDMI function, you need HDTV adapter :

» Click to show Spoiler - click again to hide... «
QUOTE(strictly @ May 11 2011, 03:14 PM)
Korean version thicker is said to be due to connection (4g) calibration and not NFC.
This is from xda:
Does the SGS II have NFC (Near Field Communications) Support?
Answer:
Originally Posted by P-Eazy
I have an email from Samsung claiming that no models worldwide will support NFC, I have posted it earlier in this forum. Samsung Korea have also confirmed that NFC capabilities will be included in new uSIM or MMC technology, it has therefore been left out of their phone models.
The extra thickness of the SGS2 in Korea has nothing to do with NFC, they have an extra chip/antenna on board to connect to high speed internet services.
NFC is embedded on battery. I think it makes galaxy s2 thicker even if it may be very small.

It's usually believed that NFC + T-DMB makes korean version galaxy s2 thicker than global version GS2.