The facts don't lie. let's not pretend that TMobile has some prized AWS network everywhere else. I've repeated this same thing in many places. Phily, Providence, parts of NYC, Hartford, etc. TMo claiming to have blanket coverage and a nationwide 4G network is the biggest lie in the industry, thus far.
If they are so spectacular, they would have won some RootMetrics comparison in at least one city. But clearly, they have not. Maybe you guys know something about their service that reputable 3rd party testing sources don't know!
Sorry, but did I say they were great and spectacular? No, all I tried to point out was that you can't condemn a network based on your personal experience in one city.
Also, I've seen you trot out RootMetrics in other threads like they are the wonderful arbiter of cell phone network quality. I honestly hadn't even heard of them until AT&T started mentioning them in their ads and on their site. Also, I highly question the usefulness of crowd sourced data for determining something like network availability and quality. It's no secret that T-Mobile has fewer users than AT&T and Verizon. That means fewer people using the RootMetrics app on their phone, and the perception that more holes exist. Where I live I see plenty of entries for all the carriers on the main thoroughfares in my town from people driving through. But I see no information for T-Mobile in the actual neighborhoods. That doesn't mean that T-Mobile has no coverage there, just that nobody has gone there while running the app. Yet that's exactly what the RootMetrics site seems to imply.
Now, I have heard of PC Magazine. And since the bar that you set is a single city, I will point out that PC Mag named T-Mobile as the best data network in Baltimore, and it came in a close second in several other cities where their LTE network is available.
Notice what I'm not saying here. I'm NOT saying that T-Mobile is wonderful or spectacular or anything like that. In fact I'm making no judgement about them at all, and I have no personal experience with them in the last 6 years (switched away to get the original iPhone). All I am trying to do is say that you've got to do more to convince folks that your opinion is valid. Suggesting that T-Mobile is not acceptable for anyone, at all, whatsoever, based on your personal experience and some fly-by-night web start up that most people have never heard of, is flawed.
If you have other reasons, then please state them in a logical and concise manner. But keep in mind that using the same arguments worded differently will not convince anyone of your point.
Edit to add: BTW, I've got lots of experience with AT&T in Houston. But notice that you don't see me on here telling people they should never consider using AT&T in Boston because my house sits in the middle of a AT&T signal black hole here in Houston. And if you were to bring up a map on RootMetics of my neighborhood, you would think that NONE of the carriers even offer service here, even though they all do and most of them work quite well.