How do I change the resolution on my Phillips 4k tv from 720 to a higher resolution tools

Today's TVS are mostly IN 4K, but sometimes the picture is blurry and of poor quality. You want to set the definition of your TV to get a better picture. Most TVS don't need to be set up because it's not the problem of TV, it's the source.

Whether it is TV programs or movies and TV series on the network, the first thing to see the source of the resolution, the closer to 4K, the clearer, the better the effect. Conversely, the effect is poor and fuzzy. Because we basically need not the effect in the picture in the picture, full screen plays the effect not ideal again, so now TV of big size liquid crystal has watch a distance. It looks good at a distance. If it's not clear, the source is too bad and the resolution is too low to change.

BTW, you can also watch 4K video ob PC and then playback with free 4K video player. Here is the recommendation.
www.leawo.org/tutorial/5-best-4k-video-player-software.html?fixya=1410

1. Connect your TV to internet.
2. Use your browser on TV to access Demo UHD 3D Ultra HD 4K HDR 3D
3. Once you have tested the TV with demo clips above, now access 4k Movies List Content Guide Netflix Amazon for UHD TVs
4. enjoy 4K video movies on your 4KTV

The TV will select the correct/appropriate resolution based on the source. To achieve the highest resolution you will have to connect a unit (video source) capable of providing 4K using HDMI 2.0 compliant cables. To achieve any HD resolution, the video source will have to be connected to a HDMI port. The ATSC terrestrial digital broadcast signal (over the air TV) is generally 720p, but many stations transmit in 1080i/1080p.