Purchased to watch TV on a flat screen on a Samsung Note 8 phone in the short time I have to return the internet modem and leave. Works great with zero setting! Just plug in and get started! My TV isn't 4k so I can't comment on that part.
Pros
INCREDIBLE PERFORMANCE. The USB-C to HDMI cable supports resolutions up to 3840x2160@60Hz, including 4k@30Hz, 1080p, 720p, 1600x1200, 1280x1024 for HD monitors or projectors; Gold-plated HDMI connector resists corrosion and abrasion and improves signal transmission quality; Molded strain relief increases cable life