It’s possible (up to probable) I get something wrong … but this here sounds like somebody fixed that for the OnePlus 5T in January.
Edit: Ok, nevermind. The more I read about it, the more it seems finding another convenient backup workflow for 15.1 or betting on Fairphone to get Android 7 ready with a working TWRP are the ways to go for me …
According to the notes it doesn’t fix Android 8.1 decryption.
It does fix the broken automatic OTA installs.
Great job everyone, not least @chrmhoffmann 
Perhaps a guide/wiki for installing Lineage 15.1 summarizing everything (TWRP, Modem-zip, getting GAPPs or alternatives) would be nice?
EDIT: Never mind, there is such a thing, I forgot (https://wiki.lineageos.org/devices/FP2/install). Is there anything in there that needs updating to account for Lineage 15.1?
Does that mean that if you have encryption on 15.1 you can install OTA updates? But if you wanted to use TWRP for anything else you still can’t decrypt…
Or do you mean encryption prevents OTA updates still even on 15.1?
So I guess we have to wait one week more for the official nighlty 
Hi,
I noticed a problem with the headphones during a call. I can adjust the volume and the GUI shows it whereas the intensity of sound does not change a lot from minimum to maximum values and it always remains quite high.
Hello,
I have fairephone 2 whith lynageos 14.1
Ny question :
How to upgrade from 14.1 to lynage is 15 whithout install google services ?
Thanks for your support
Best regards
Battant
Once the official nightly release is available, you’ll simply upgrade. Google services are not included in official LOS releases (and they haven’t been included in the unofficial releases posted in this thread since the 2nd update).
You can install the latest unofficial build now, but you’ll still have to upgrade anyway to the official release so it’s probably worth waiting a few extra days and just doing it once.
And we are official.
Chris
THIS IS AWESOME!
That is a 
for the whole community.
You definitively deserve some cases of beer 
Thank you for your work. I (and I am sure many more than me) really appreciate it.
Time to retrospect:
Officially launched with Android 5.1. Now we are on the 3rd major update!
This is how sustainability should be.
Thank you again.
Exactly, and
Fairphone should point out more often that among other green and social items Fairphone is a very safe phone. I do not know any other phone offering so many regular updates and upgrades (Lineage, Ubuntu, etc) . Normally phones get only updates in the beginning and, sorry to say, I know people who bought a new phone which did not get further updates.
An excellent product like Fairphone should tell all people what are all the advantages and positive differences to other products.
This is really cool! Thanks a lot!
I guess, LineageOS with integrated microg will follow soon? Do you know if this will happen automatically?
Looks like it’s building right now
Now (at least as an “experimental”)
I’ll copy this here, just in case:
Upgrading to 15.1
We’re starting our 15.1 builds with some devices (listed below), with others migrating to 15.1 sooner or later. Note that several older devices are unable to receive official builds at this time due to the lack of support for working HAL1 camera recorder, which was broken by the treble changes, but don’t worry - we’re working on it.
From official LineageOS 14.1
- (Optional) Make a backup of your important data
- Download the build either from download portal or built in updater app
- You can export the downloaded package to the sdcard from the Updater app by long-pressing it and then selecting “Export” on the top menu
- Download proper addons packages (GApps, su…) for Oreo 8.1 (8.0 packages are not compatible).
- Make sure your recovery and firmware are up to date
- Boot into recovery mode
- Format your system partition
- Install the LineageOS 15.1 build, then install all your addons WITHOUT rebooting
- When you’re done, reboot the device.
Note that:
- Wiping data is not needed when upgrading from an official build
- While you’ll be able to download the update from the updater app, you won’t be allowed to install a 15.1 build on the top of a 14.1 one automatically
From anything else (including unofficial LineageOS builds)
- (Optional) Make a backup of your important data
- Download the build from download portal
- Download proper addons packages (GApps, su…) for Oreo 8.1 (8.0 packages are not compatible)
- Make sure your recovery and firmware are up to date
- Boot into recovery mode and wipe data
- Install the LineageOS 15.1 build, then install all your addons without rebooting
- When you’re done, reboot the device
Note that wipe data is always needed when coming from something that’s not an official build, regardless of the Android version
Source: Lineage OS blog, Changelog 16 - Smart Styles, Treble is trouble and Omfg Oreo – LineageOS – LineageOS Android Distribution
The build is flagged as experimental, as it is done outside the normal build schedule. I asked to get a build before the schedule just to ensure that it builds also on the lineage servers and test upgrades. Nothing else is experimental - no other code.
You can flash this build through twrp as an upgrade from 14.1 without wipe (but don’t forget to flash new gapps directly after without reboot). It will not show up as an available update on the phone. When you have flashed this, you will no longer see lineage updates. The next official build must be flashed manually again through twrp. Then you will see updates again whenever theres a new lineage build.
Happy testing. This one allows testing the 14.1->15.1 upgrade (regardless of encrypted or not).
If you upgrade from my previous unofficial builds, you need to wipe or do key migration (see
https://wiki.lineageos.org/signing_builds.html).
Chris