A newer Sprint MVNO crossed my radar earlier today, might be worth mentioning as a Ting alternative for the rats fleeing the SS RingPlus.
Twigby.Still kind of new and launched around May 2016. Parent company is SI Wireless, who owns MobileNation - a regional Kentucky/Tennessee network operator going back to 2010 with about 30k users. Their terms of service are reasonably benign for a Sprint MVNO. Their plan pricing structure is similar to Consumer Cellular, they're running postpaid model pricing (so there's undisclosed additional fees), and they offer free voice roaming on Verizon/USCC/regionals (like Ting). Plans start at $9/month+tax for 200 minutes and "unlimited" SMS messages, with data plans extra (starts at $3 for 150MB), and plan overages either bump you up to the next bucket or you can restrict data speeds to 2G after the high speed allotment. Haven't talked with anyone at customer support, nor have I found any reliable reviews for Twigby or MobileNation, but there are a couple employee reviews of MobileNation over at
Glassdoor which is a bit of a mixed bag and a bit dated. There aren't any red flags, but I am a bit reserved none the less, mostly due to the lack of reviews and age of the MVNO itself. They also blow many trumpets about "care and respect" of customers, which could potentially be a good thing if they follow through, and easy to detect if they don't over time.
They're also offering the first month of service for free with RingPlus ports.
I don't normally mention newer providers, but the parent company is reasonably established and the Sprint MVNO landscape is slim pickens and a bit of a privacy trainwreck these days, especially with more affordable, low-end, single line plans. Worth investigating at the very least.