FTP Upload

Ok, I was having some the same issues with online gaming. Because t mobile blocks UDP protocol. If you use a VPN it should resolve the issue. Try using speedify. They have a trial version u can run and won't cost u anything. Thing is itll cost you if it works. I know why is t mobile blocking some file transfer protocols. I have no idea. I wish they change the required NAT type to or atleast the common ports for video games. I think they'll get around to changing alot of things to better serve us but it'll be a long road. I've had Verizon for 8 years and I never get the speeds with them that I do with t mobile. So I'll stick around. I hope this helps.