Yes, Netflix subscribers can stream content on Netflix in 4K on their phones. If you want to use your phone to watch 4K Netflix, you’ll need to ensure you’re subscribed to the Premium plan. Plus, the playback quality should be set on “High” or “Auto.” Finally, don’t forget that not all content on Netflix is available in 4K. If you’re interested in such content, search for “4K” or “UltraHD” in the app. Keep in mind not all mobile devices are compatible with Netflix 4K streaming. If you have an older device, you may not be able to play content in 4K even if you’re subscribed to the Premium plan.