Is downgrading Android possible - Google Pixel XL Questions & Answers

Hello, before i start tinkering around and installing roms i was wondering if downgrading from say LOS with android 11 back to stock android 10 will be possible?

It is, many guides

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Looking for some advice regarding flashing on the P6

My boss bought one of these from China last year and it came with a chines OS and did not have the Play Store.........
I managed to root it and flash on a custom OS [PAC-MAN], specifically a 4.2.2 jelly bean version.....
I looked into getting the device upgraded to 4.4.2 kitkat but was put off by the downgrading etc that was involved...
he now feels like a change and I would preferably be looking to install a stock kit kat OS on to his device.........
as I have not been playing about with this phone for a while, could someone provide a basis step by step guide to what is required.........
I can flash ROMS no problem but the issue I had the last time was being unable to get the phone officially updated to stock 4.4.2, to then go on and flash custom ROMS after that.......
Thanks in advance........

Update old phone

Hello, I found my old HTC 10. I tried to upgrade it to a newer rom. It's currently running an old Cosmic OS rom. Can anyone tell me based on the images, what I have to update?
Information https://imgur.com/gallery/IxBHkud
Go to this forum, your answer is there.
https://forum.xda-developers.com/htc-10/development

How to downgrade?

The question itself in the title. Is there any way to downgrade the phone from Android 11 based RUI 2.0 beta to stock Android Q? As I know a lot of phones have been bricked while trying to downgrade. So I searching for working and safe method how to do it right. Any suggestion?

Porting older android version on MTK

Hi everyone! A long time ago i've heard that it's not possible to port older android version on newer kernel, however it seems strange, since major kernel version stay the same(3.x). I've tried myself sometime ago(i have some exp in porting firmwares, but i've ported custom ROM of same version) but got bootloop(from 6.0 to 4.2). Have anyone got some success in porting older android version?

Any good custom roms for the Xperia S?

Hey everyone it has been a while (legit like 10 years later but who cares anyway)
I'm kindly asking anyone who has links (that aren't dead) for roms that are on android version 4.4 thru 8.1. I still have my xperia S lying around and it currently has chromas 5.1.1 from currently installed but since android 5.1 is buggy and slow for me. I wanted to try out to use android 4.4 again since its been a while since I've used a phone with android KitKat (my galaxy s4 is running android marshmallow).

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