T-Mobile-YouTube incorrectly throttles 1080p high bandwidth videos on youtube.com in the web browser for ALL T-Mobile customers

It just congestion. The towers where you are at are just overwhelmed by the volume of users. Sadly, your speed will not change till their network is upgraded to handle the volume in your area. We're talking months or longer. I'm in Los Angeles and now only get 3-4 mbps with T mobile for most of the day through out the entire Los Angeles area. So if you live in a large metro area, don't expect much service or cross you fingers that your towers are not congested. Their solution was for me to sign a new contract for a free low end phone or buy a high end phone from them. My recommendation is leave T mobile. 

PS. Another ISSUE is, T mobile is shutting down Sprint network without keeping all of the bandwidth working, this will make many of the sprint phone obsolete. 😕