Is My Samsung 48" 4K UHD Smart TV UN48JU6400 Directv Ready

[Can You Help Me Please]

I just talked to Directv to schedule a new upgrade for my existing Directv subscription. They are going to set me up with 4 new wireless genies. One of them I'm going to be using for my new 4K tv. My main question is if I call them back with this model that they are not familiar with because I didnt know the model, would I be able to have one of them in 4K for my new tv and would that cost me extra.

 

[Can You Help Me Please]

and is 4k really going to make a difference? The package I have is already HD