<human>:  How do I watch 4k on Netflix on my iPhone or iPad?
<bot>: Watch 4k on Netflix on iPhone or iPad
1. Make sure you have the Premium plan.
2. Open Netflix.
3. Tap More on the bottom-right.
4. Tap App Settings.
5. Tap Cellular Data Usage.
6. Select the highest option.
7. Tap Download Video Quality.
8. Select the highest option.