Premise (this is just to provide context, you can skip to the question below if you want): last year my beloved Lumia 630 died in a bicycle accident, and I bought a Nokia 3 despite my personal preference for Windows Phone over Android so I could finally play Pokémon Go. It came with Android 7.0, and it took me some time to adjust (to this day, I still miss some Windows Phone features); eventually, it got Android 8.0 via OTA, and everything was fine until a few days ago, when it got Android 8.1, which more or less turned my phone into an expensive paperweight. Everything is slower, some options got removed, some other "features" were added, and on top of all that, I have problems with Pokémon Go (which, as I said, was the number one reason that led me to pick Android over Windows Phone this time). I can't keep it in this status, so... Here's the actual question: is there a way to remove Android 8.1 and reinstall 8.0 on a Nokia 3? I tried to search on Google and I eventually found the xda forums, but it all looks complicated to me since I know literally nothing about Android's internals, they talk about bootloaders and recovery mode, and it all looks scary to me, I need baby steps on this one. Furthermore, it looks like that their guides are tailored towards people who want to root their phones or do other advanced things, I don't need/want twrp, root, magisk, supersu, adb, there are many of those names that keep on recurring and I have no idea what they're talking about, I don't need/want any of that, I just want to reinstall a stock Android 8.0 (hell, even Android 7.0 would do) on my phone, and ignore subsequent OTAs for the time being. Can anyone help? Again, baby steps, no fancy stuff, no root, just vanilla Android 8.0. I guess I'll have to lose all my data, but half a day of restoring stuff is a small price to pay if I can have a usable phone again. Thanks in advance.