200 PING

Cellular networks are not designed with a low ping in mind.  Towers relay to towers for miles and sometimes hundreds of miles before they connect to ground infrastructure.  

@hanlianhua 

Your download and upload speeds are similar to mine, and I live in rural Michigan. After a discussion with a technician yesterday, he concluded that the tower I was connecting to (which is about 3 miles away) needed to be repaired.

I told him that I occasionally had decent speeds, so he looked deeper into my connection history and found that a few times, probably when weather was optimal, I connected to a tower that is much farther away. 

So here I sit with terrible speeds until they fix the tower.

FWIW, I was in Detroit on Monday and the T-Mobile speed at my hotel was just as bad as it is at home. I think they have widespread tower issues. Hopefully this is just growing pains and they'll sort it out.

Speed testing and latency of the pings can vary quite a bit. When running the test with speedtest.net try different servers. I repeatedly saw the application suggest an "optimal" server but find results with that suggested server stink. I did quite a bit of testing and found various servers and routed paths that ten to provide better results. I prefer to use a single server I set in the settings as a baseline target. If you just test to whatever "optimal" server is suggested well that server may not be optimal.

Performance over the T-Mobile wireless solution can vary quite a bit from one location to another. Many locations perform quite well. Now that the n41 is in our location my speeds doubled over the n71 and the signal is cleaner so performance is quite good. When T-Mobile engineers get it right and conditions are favorable it is actually a pretty nice solution. Its not all bad out there.