Up until a couple of years ago the cell phone industry was like gasoline. As soon as one carrier raised their price on something, all the others followed suite.
^^^this is exactly what I remember 3 years ago. AT&T stopped offering unlimited data and not that long after, Verizon stops. Then, Verizon starts the ridiculously expensive Mobile Share plans, which also gave a small amount of data. Then, AT&T soon followed. It seemed like costs were increasing with no end in sight. I'm glad T-Mobile is finally prompting AT&T to adjust their offerings, which then forced Verizon to make a move.
Sprint.
Unlimited over anyone whilst they're upgrading their towers with multiple speeds (LTE & Spark).