It's Not UHD. Review on VU Android 4K UHD LED TV

I have bought this tv for my office. The company said that it is 4k UHD television but the picture quality of this television is not 4k or UHD. I have both SAMSUNG and VU television once in my office and the other is in my room. one day I came to my home for lunch my wife watching the movie on my SAMSUNG television. When I return to my office my partner also watching the same movie as my wife was. But the picture quality of VU television was not as clear as Samsung television. So next day I connect both televisions together and play the same channel and the result was clear. VU television not even any near to Samsung television in sense of clarity. So I call to VU customer care but they said it's not possible the problem was in your cable, so I said that I use the same cable. VU company does not provide their customer with proper quality. if you are tight on wallet then go for this tv otherwise chose another one