I finally decided that the price of iPhones exceeded the value I was getting out of them. Also, my iPhone 5S was rapidly becoming impossible to hear or be heard on, for normal voice calling. I was tired of yelling into my phone.
So, after having an iPhone on Verizon since nearly the beginning, I switched. I went to Cricket Wireless, signed up for a $30/month plan, ported my number over, and got a free LG Spree smartphone.
Honestly? I love it. For me it's perfect although YMMV. It's great for regular (voice) phone calling, and the quality of voice transmission is fabulous; I can hear not just the voice, but also the right tone quality or timbre of that person's voice. No more need for me to yell into my phone. My iPhones have never had voice transmission this good, even on day one. Also texting is so easy that I started doing that for the first time.
OK, the cheapskate in me also loves that it was free and that makes me want to grin every time I use it.