4k TV not in 4k, only 1080p

aces19

Reputable
Aug 27, 2015
816
0
5,360
Just bought a 4k tv. When I turn it on, it displays the resolution as 1080p. In the menu, the max res is also 1080p. This is a 4k TV, how do I get it to run in 4k? Do I have a box or something that can't run 4k?
 

aces19

Reputable
Aug 27, 2015
816
0
5,360


Is the amazon firestick 4k?