Final answer:
Up to 4K UHD video streaming refers to the quality of video streaming when activated in a mobile plan. It means that you can stream videos in Ultra High Definition (UHD) quality, which has a resolution of 3840 x 2160 pixels.
Step-by-step explanation:
Up to 4K UHD video streaming refers to the quality of video streaming when activated in a mobile plan. It means that when you activate the up to 4K UHD video streaming feature, you can stream videos in Ultra High Definition (UHD) quality, which has a resolution of 3840 x 2160 pixels.
For example, if you have a mobile plan that includes up to 4K UHD video streaming and you activate it, you will be able to stream videos in 4K resolution on your mobile device, as long as your internet connection speed is sufficient.