Comment by onli

With reasonable ethical you indeed might want to look into the Fairphones. The Fairphone 6 was reviewed as being a nice improvement over the 5. I'd expect LineageOS to land on that device some time in the future, after all the prior three models are supported. You could wait for that, or settle for the 5.

If you want something cheap and easy instead of the Fairphone, the Motorola moto g 5G (2024) looks good. Supported by LineageOS 23.0 and also on the list of calyx devices, https://calyxos.org/docs/guide/device-support/#modern-device..., with vendor security updates till 2027 (though calyx is on pause, that's me only hoping the device list will still apply afterwards, would be an interesting additional option). Not available in my market though, or just hard to find with that name given the other similarly named motorola phones.

OnePlus 12R is one of the newest phones that is supported, and will get vendor updates until 2028. No headphone jack and no sd card slot though.

Ethical does not describe the OnePlus and Motorola phones. But anything used could be judged as such, since you then at least did not add to the garbage pile of unrepairable devices directly - but they are a bit new for that maybe. On the other hand, vendor security updates don't exist for many of the older devices (especially those from Motorola, they churn out new devices by the dozens and almost immediately abandon them), and the new EU regulations that force vendors to provide security updates only apply to new devices.