Comment by Arkanosis

Also mandate upgradable software. I feel that outdated software becomes an issue way before dead batteries for most phones on the market. Most vendors don't seem to care much about software upgrades, especially on the lower end, and not all devices are supported by LineageOS / postmarketOS and co. I'm not even talking about (ok, technically, I am) how hard and scary it is to install alternative firmware on smartphones: unsupported rooting process that can brick your device, loss of your data while rooting, unsigned binaries distributed by unknown third-parties, broken warranty by using unsupported firmware… Vendors should be forced to sell either hardware that can be used with third-party software, or harware and software that is guaranteed to be updated for more than “up until the next shinny new device is out”.