I have recently bought this 4k tv and I connected my local settop box to it, was working fine and then I switched to Tatasky ( Because it supports 4K) .I got 1 month free 4k channels, It was showing literally Crsytal clear image and when I took Tatasky HD packages it was showing Full HD and a little upscaled becuse after all it is connected through HDMI apart from this, the android part of this T.V. was very fast however to connect to internet via Wifi it needed better speeds, which something I did’nt find very pleasing. Sound was loud as well as very clear so never think twice before buying this impeccable T.V.!