HD streaming on T-mobile Amplified plan


    I recently made the change to Tmobile. Also upgrade to the new s9 plus, that being said on my plan details it says that i have HD streaming. Now when i watch youtube videos it by default plays on 480p (Youtube app) i changed the quality to 1080p on the settings of the video that im watching but after a few seconds starts to buffer and not play smoothly. What do i have to do to get it to stream at 1080p by default? I have checked on the tmo app and that option of media settings is not available. Thanks

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