They manufacture for all the major cell service providers and it depends on what parts of what electronic devices.
Samsung
There are a wide variety of companies that manufacture 26 inch LCD televisions. Magnavox, Vizio, Sharp, and Samsung, for example, each manufacture this product.
Companies such as Samsung, Apple, Micromax, Nokia and LG manufacture several 3G cellphones. These phones include the Samsung Galaxy S3, Micromax A116 and of course, the Apple iPhone.
There are many companies that manufacture cheap Televisions. These companies include LG, Samsung, Sony, Sanyo, all whom may offer some cheap televisions.
Some companies that manufacture 50 inch LCD TVs include Sharp, Samsung, Sanyo and LG. These 50 inch televisions are now available in the LED versions.
You can check Tigerdirect or Newegg to see if they have any on their site or you can directly check manufacture's website such as Hewlett-Packard, Samsung, Sony, ASUS if they manufacture monitors with adjustable features.
Sony, Bose, Yamaha, Logitech, VIZIO, and Samsung are just a few companies that offer wireless surround sound products. These can be purchased at most electronic stores, and online at Amazon.
Samsung, for sure. But, not sure about the rest.
Yes, all Samsung LCD TV's are considered "multisystem". They require a converter for the broadcast and possibly power as well, depending on what country you're in. http://answers.us.samsung.com/answers/7463/product/UN40C6300SF/samsung-40-class-6300-series-1080p-led-hdtv-questions-answers/questions.htm
Some of the more well known companies that manufacture home theater amplifiers include Yamaha, Bose, Harmon Kardon, Panasonic, Philips, Pioneer, Samsung, Sharp and Sony.
Internal software issue. Most likely need to return to manufacture for software re-install
Samsung provides televisions, other than 50 inch, in the sizes 32, 40 and 46 inches. These televisions are the same brand and style just smaller in size than the 50 inch.