Some of us choose Verizon for the network quality. Sitting here in my office, I get 5 bars on Verizon and 1 on T-Mobile. In my apartment, I get 1 with T-Mobile and 4 with Verizon. In other parts of this building, elevators included, I get full service with Verizon and none with T-Mobile. I really wanted to switch, so when work adopted them as a test, I got T-Mo right away. Sadly, their network is still not nearly as built out, and Verizon is worth the extra money. I live right outside Chicago, in a city of 200,000 for what it's worth.