I would advise that you use the firmware for the region where the television was intended for. If you have further questions, unfortunately I have to suggest that you call the Samsung Customer Service Support center in your area. They'll be able to assist you further for your particular unit.
The regions can differ, so the local service people can speak best to your region, moreso than I can. I appreciate your understanding.
I have a LA40B650 LCD TV. Can some one tell me which firmware to use for enabling internet@tv. I tried UK firmware. Internet@TV works but AV1, AV2 is not recognized.
Also has some one tried DLNA features? I have not got the same to work