Verizon is sort-of doing this with the new Palm "Plam" phone - https://www.theverge.com/2018/10/15/17974850/new-palm-smartphone-android-lifemode-time-well-spent

Verizon is sort-of doing this with the new Palm "Plam" phone - https://www.theverge.com/2018/10/15/17974850/new-palm-smartphone-android-lifemode-time-well-spent-verizon https://www.theverge.com/2018/10/15/17974850/new-palm-smartp... It's not "no extra charge" -- you pay an extra $10/month. But you get a traditional full-sized smartphone, and an additional small "Palm" phone with limited screen size and features, running on the same telephone number, with no extra setup or services required.