Upgrading firmware under Lineage OS

[AnotherElk]

If I don’t read this wrong, flashing the necessary partitions should be possible manually …

Official LineageOS 17.1 for Fairphone 3/Fairphone 3+

Hi and welcome to the forum! You are correct, the LineageOS images contain partition images for system, boot, vendor, vbmeta, and dtbo. You can extract other partitions such as modem from stock OTA zips, provided you install the necessary tools and flash them yourself with fastboot. I do not believe this is harmful in any way, as the code on these partitions is suitably decoupled from the Android OS and partially runs on dedicated processors at runtime. At the moment this may be an option to …

… and LineageOS should come with firmware updates included in the future …

Official LineageOS 17.1 for Fairphone 3/Fairphone 3+

Sorry, no, the inclusion of firmware partitions is still under review by the LineageOS directors. The latest feedback was that they want us to include a longer list of partitions, not just those I listed in the post above. If this passes review, we will then ship aboot.img cmnlib64.img cmnlib.img devcfg.img dsp.img keymaster.img lksecapp.img mdtp.img modem.img rpm.img sbl1.img tz.img