I am done with Verizon Wireless for many years but was looking at T Mobile eventually, no time in the near future maybe in the next couple of years. I like how their business plan is unlimited data.
Totally wrong way to pick a carrier.
First step - check every place you're going to need coverage (that means when you're sitting at your desk, not just the hallway by your office), inside your house, in the back of a large store you may want to call the wife from - exact locations. A phone without coverage is worth less than a brick - the brick makes a better weapon. (I moved to North Caroline on Sprint, which gave me solid coverage in New York. I couldn't find a dead spot [and, having been in the business, I looked, because the "service" Sprint used to have in the area varied between none and non-existent]. When I moved here, the signal wasn't as great, but it was usable almost everywhere - except inside my daughter's house. Front step - fine. Walk inside the door and you lose it. Rear yard, patio - fine. Walk through the patio doors and you lose it. [There's a sharp ridge about 100 feet south of her house, and Sprint's tower is to the south. Knife-edge diffraction caused the hole.] Verizon worked fine in her house, but I don't like what CDMA sounds like when it goes digital, and I like to be able to switch phones by switching the SIM card to another phone. I checked AT&T's coverage by buying a $10 Tracfone that uses AT&T towers and they have an entire area of town with poor-to-none coverage - that I'll never be in, so I don't care. The rest of the city is solid. So I'm on AT&T. The fact that their Device Support Center has great people working there is just a bonus.) Costs more, but I don't mind paying for service.
If you want cheap, Walmart is about $35/month (I think it's 2.5GB of data at full speed) and uses TMobile.
How much data do you consume every month?
Between me, my wife and one grandson (moved him over to our plan a couple of months ago), it varies between a few hundred MB and 10-12GB. Mostly him. I rarely get close to 1GB/month, and my wife never does - since suffering a stroke, she's usually at home - wifi, texting, Skype or on her laptop (no World of Warcraft for phones yet) or at a doctor's office and she doesn't bring her phone because I always have mine and our calendars are linked.
My use? My phone is my "don't want to lug a laptop" computer. I can analyze networks, check satellite positions, announce my location for APRS - just about anything I can do on my laptop. Oh - and make phone calls.