It's hard to go wrong with Ting. Just with the month-to-month billing, one month might be high, next month could be low. It's much better than every other plan's high rates every month. With a little modification to my behavior (not downloading 100MB podcasts on the cell network), I had gotten my plan down to around $20 a month.
Another weird thing, apparently Sprint was slowing down old phones in my area. My EVO 4G was ok, getting 300-500 kbps when I first got it. A few years down the road, it's pulling 50-150kbps. I had been waiting 4 years for WiMAX 4G to come to my area with no luck. Why upgrade to a better phone, when the network is so sucky and moving to LTE means it'll be another 10-20 years for it to come to my area?
I bail on Sprint, and go to Ting. After a year there, I noticed the Galaxy S3's prices on eBay are reasonable now. I make the upgrade. The first thing I did was a speed test. It's doing 1500kbps. WTF? The old EVO was barely chugging along mere seconds ago. If Sprint wasn't so stupid, I guess throttling old phones to entice me to upgrade, I wouldn't have bailed on them. In the end, I win.