I keep watching as T-Mobile is winning new customers and have to admit, that having been one of their customers for over 15 years, as well as with Verizon and AT&T, the Magenta network is constantly getting better. And they are doing a better job than the competition of telling the world that they are.
Honestly, I haven't used my Verizon iPhone 5 that much since the iPhone 6s arrived. The first reason was how poor the voice quality on Verizon has become, especially on calls routed via Google Voice or Switch to the phone. This is the opposite when compared to T-Mobile, where the audio quality is either HD when the other party is calling also on the T-Mobile network, or just better, because their network isn't as crowded.
The second reason was obviously that I had new iPhone 6's (6 and Plus) that were only GSM editions.
The third was even more important. When I'm on T-Mobile's LTE network and using a conferencing service that has an app, like WebEX or GoToMeeting, the audio quality exceeds Verizon and AT&T, though the coverage areas is not as large. Too often, especially on AT&T if I'm in motion on the highway, I'll drift from LTE into 4G coverage. Out here in San Diego, in the areas surrounding I-5 I found that T-Mo's LTE coverage was not as geographically wide, but where it was, it really was and it didn't come and go as often as AT&T does.
Lastly, I'm a big user of iTunes Spotify, Pandora and TuneIn when I'm in the mood for music, and while I also have access to SIRIUS XM in the car and via their Apps, sometimes I just want my music or the music I like. T-Mobile's unlimited music delivery means none of what I'm listening to goes against my data cap.
My primary iPad, the iPad Air 2 is also on T-Mobile, so while I haven't yet given up my iPad on AT&T's SIM that is totally and will forever be "unlimited" I found that for the most part I'm not lacking in coverage that often.
Ironically, where I have found T-Mobile to be weakest is at major airports, and that's something they need to address. But it comes at a time when I'm also finding AT&T's coverage in some airports to be less available as airports like San Diego have modernized, but their DAS system is virtually non-existent, if they even have one.
Right now, I'm loving how good T-Mobile is. I'm sure though that the Blue and Red guys will catch up, but by then Sprint will have expanded their network enough to be someone to consider again.
P.S. And, there's one massive reason why they are winning too. It's all in the customer service. Over the past seven months every single need I've had has been addressed professionally, and within the day, on a par with American Express' level of care.