Back in 2019 my parents bought me an a7 2018, and I've been using it ever since. But recently, this phone has become such a buggy mess that I realized that it's generally received a single update (apart from a small patch out of the box). After poking around on the internet, I see that the a7 2018 was given oneui 3.1 in 2020?!?!
After speaking to a support agent who only gave me copy pastes answers that didn't help anything (Why ask what I've already tried if you're just going to tell me to do it anyway?), I was directed here in the hopes of finding an answer.
Reading online shows my phone was given oneui 3.1, but for whatever reason I'm still stuck on base android 9.
I've tried uninstalling everything, resetting settings, and even factory resetting the phone, all to no success. Is there anything left that could fix it?
Any help would be much appreciated, thanks for reading