Is the BT/EE box 4K?

[DavidCheshire]

I bought a 4K TV and upgraded my Netflix subscription to 4K. The TV and the BT/EE box are connected to the BT hub by wired ethernet connections. 

When I play a Netflix 4K show directly on the TV, it is clearly 4K, but when I play it through the BT/EE box, it appears to be only HD 1080p. 

Do I need to do something to get 4K to play via the BT/EE box?

[David500]

Our 4K TV had all the HDMI ports set to 1080p and had to go into the TV settings for the appropriate HDMI port set and change it to 4K.

[DavidCheshire]

Although I plugged the box into an HDMI port labelled 4K 120Hz, that may be the answer.

The user manual says, "HDMI IN (4K 120 Hz): If you use an HDMI device that supports video output in 4K 100/120 Hz, connect the Ultra High Speed HDMI Cable, and follow the instructions displayed on the screen to set the [HDMI signal format] of the HDMI IN port."

This implies that connecting an Ultra High-Speed HDMI Cable automatically triggers manual setting of the port to 4K. 

I used the HDMI cable that came with the BT/EE box. 

In another section, the manual says, "When you watch 4K picture with High-Quality, use a Premium High Speed HDMI Cable that supports speeds of 18 Gbps" and "To display 4K 100/120 Hz or 8K picture, an Ultra High Speed HDMI Cable that supports 48 Gbps is required." 

Does the BT/EE box need the higher 48 Gbps cable? (Actually, they are cheap enough that it doesn't matter, I'll get a 48 Gbps one.)