Came across this the other day (was discussed on a Radio 4 programme*):

https://www.fairphone.com/en/

Looks interesting.

*on the same programme it was said that the manufacture of a mobile phone uses an astonishing 12,000 litres of water (I presume this includes all the steps in the process like refining of the rare earth metals that go into it). Multiply that by the millions of mobile phones.......!

I was fine with my old Nokia phone too until we started a charity group and some of the group found that it was a lot easier to communicate simultaneously with the rest using WhatsApp. Consequently I had to get a smartphone like everybody else. Having said that, this was 5 years ago and I have no intention of changing the phone as it already has far more "gizmos" than I will ever use!