I too am using a Nokia KaiOS phone (8110 in my case) from time to time. Two flaws of the device that I think would make it hard to use as a primary are the sho

I too am using a Nokia KaiOS phone (8110 in my case) from time to time. Two flaws of the device that I think would make it hard to use as a primary are the short battery life (far from the fabled 10 day charge of yore) and the short key travel distance that makes it very easy to do multiple presses by mistake. The second thing is particularly annoying when entering your PIN (if you decide to use one).