When I have LTE on data is very slow at times, so I switch to UMTS(3g/4G) and I get faster data speeds but I'm missing some calls. So now I have LTE on because calls are more important to me. But it shouldn't be like that,
I think T-Mobile is having some serious congestion issues that I don't know how they may solve it.
One solution could be ending free Binge On data streaming but keeping the "optimization" and maybe lowering the rates or giving some estra Gigs to compensate.