1. Make sure that you meet hardware requirements
If your TV supports 4K content, you should automatically see the 4K Ultra HD section on your device. Here are some requirements for 4K content:
Internet connection of at least 15Mbps Ultra HD TV with HDMI port and support for HDCP 2.2 content protection standard
To check if your TV supports HDCP 2.2 standard, do the following from the Fire TV menu:
2. Make sure that your TV supports 2160p 60Hz video playback
Some older TV models might not support 2160p 60Hz video playback, and that can cause this issue to appear. Some applications require support for 2160p 60Hz playback, and if your TV doesn’t support it, the video quality will automatically switch to 1080p. To check if your TV supports 2160p 60Hz playback, be sure to check the instruction manual.
3. Toggle Ultra HD Deep Color option on your TV
Once you disable it, wait for a few moments and turn it back again, and check if 4K video is working.
4. Use the hidden resolution options to select 4K resolution
This will change the native resolution to 4K, and 4K content should play without any problems. Bear in mind that enabling this option might make your menus a bit sluggish. READ ALSO:
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