[Xiaomi Poco F1 ROMs, Kernels, Recoveries, & Other ] ipdev:
Hi All. :)

To answer a few questions/comments.

It's not as much about what fingerprint is used, along as the security date corresponds to the fingerprint.

Newer build fingerprints get certified along with their security date.

If you use Magisk Hide Props module - Link - and pick a fingerprint from the list, it sets the fingerprint and corresponding security date.

Note: The build fingerprint is just one way Google and apps can detect what device you have. In the case of Google, it may affect what app or what version of an app can or can not be installed. Other apps, if you use a kernel manager for example, it may want to download and/or install the wrong version or update of a kernel.

Xiaomi Poco F1 fingerprints (and security dates.)

ro.bootimage.build.fingerprint=Xiaomi/beryllium/beryllium:9/PKQ1.180729.001/V10.2.2.0.PEJMIXM:user/release-keys

ro.build.version.security_patch=2018-12-01

ro.bootimage.build.fingerprint=Xiaomi/beryllium/beryllium:8.1.0/OPM1.171019.011/V9.6.18.0.OEJMIFD:user/release-keys

ro.build.version.security_patch=2018-07-01[/I]

Google has changed a few things.

I believe I even saw an article in the xda news feed about it.

Here it is. - Link

Google's apps will now update even if you are not logged into Google.

Not sure if this is still in roll-out but, I can confirm it is active for me.

The core of Google, if installed, will always update automatically.

framework, vendor, service, can't think of the fourth right now.

By installing gapps, you agree to the terms.

Yeah, I doubt most people even skim these. ;)

Just one set of the terms of agreement. - Link

About Software in our Services

When a Service requires or includes downloadable software, this software may update automatically on your device once a new version or feature is available. Some Services may let you adjust your automatic update settings.

-SNIP-

Modifying and Terminating our Services

We are constantly changing and improving our Services. We may add or remove functionalities or features, and we may suspend or stop a Service altogether.

You can stop using our Services at any time, although we’ll be sorry to see you go. Google may also stop providing Services to you, or add or create new limits to our Services at any time.

-SNIP-

For install instructions.

Poco F1 is now supported so, LineageOS Instructions. - Link ;)

Pretty much the same instructions. So for those who have been flashing devices for awhile, the steps are probably just instinct.

Here is an old example. - Link

As for fastboot images, well I never read miui's instructions (until a few days ago ;)) so I was not aware that some might be using a mi program. Sure I used mi's unlock program like everyone else but, as soon as my bootloader was unlocked, I logged out of my mi account and haven't logged in since. I've just been using fastboot.

Here is a good link for instructions. - Link

Ignore the part about re-locking the bootloader. :p

Vendor / Firmware updates.

Not sure how often the firmware is actually updated.

If I have some extra time I might check.

Vendor on the other hand, well we all know 9.3.x hangs on the splash screen, 9.2.25 vendor is working fine. So if there were any changes in the firmware, it is not causing a problem.

Sidenote: I flashed 9.3.4 vendor and firmware. Then just replaced vendor with 9.2.25 and I am booting fine.

Poco F1 is (now) in the Xiaomi selection for LineageOS Downloads. - Link[/I]

Custom Recovery.

(I use) Official TWRP - Link

xda thread - Link

Encryption.

This post got way too long and I need some sleep, so I'll stop here. :P

P.S.

Take a look here. - Link