Ron has a Yota 3 mobile phone that has an eInk screen on one side, and a regular screen on the other. The result is better battery life. But he hasn't been able to turn on the data for the phone. You should be able to go into the cellular settings under Network and Internet, and enable the data options. It could have been disabled. Also turn on mobile data and roaming. You may need to input the APN settings, which you can find online.