The highest display resolution of the 49UH6500 is 4K Ultra HD. That's over four times the display resolution of the most common HD type of Full HD. 4K Ultra HD TVs have a resolution of 3840 x 2160 pixels.
A 4K Ultra HD HD type is in fact the best display resolution amongst all comparable spec televisions that have been available for a similar time to the 49UH6500.
An HD Ready HD type is the worst display resolution across comparable types of TV.
4K Ultra HD TVs have a resolution of 3840 x 2160 pixels.