Depending on the phone, that can be relatively easy.
What I mean is putting modem and oem files from Xperia 10 onto XA2 (Ultra) to attempt to get working T-Mobile VOLTE. Newflasher won't do it, so trying manually doing it, but I seemingly can't write to /oem, and recovery doesn't pick it up.
I thought about this, and I'm not really sure. A lot of the phones I liked using are before 2015. This leaves me with two options.
The Sony Xperia XZ1 Compact:
I'm still using the XZ1C, it's still fast for what I use it for, and does everything I need. The modem bug annoys me though, and keeps it from greatness. The battery is still really good, even after replacing it with a Chinese battery and 80% charge limit. It's almost the perfect phone. Make it 18:9 and have modern specs with stable software and it would be awesome.
Runner up (The only other post 2015 phone I've used enough and is good enough to like):
I really liked the S7 (Exynos), the last semi good Samsung (until you get to S10e) Although it's kinda slow and didn't work well for cell in the US.
You wear one port twice as often though.
They removed the headphone jack to sell "fair"buds. Every manufacturer removing the headphone jack has coincided with or near the launch of Bluetooth earbuds. "Fair"phone is no different, so they probably won't bring it back.
$700 for basically 5 year old CPU and a phone that doesn't work or work well in most of the world. You're better off getting an old flagship, and it's probably better for the environment anyways.
We need S5 but with modern specs. Galaxy Alpha would be zased phone if it had a MicroSD reader.
I'm actually curious about this too, I have no idea where to find the answers to very specific questions anywhere aside from ask and hope.
Actually typing this from a Z3C. It's a secondary phone though being bootloader locked and on 5.1.1. I use it without any GAPPs.
If only it didn't require you to have a new phone to run it. (Minimum Android 10)
If only it wasn't Material You.
I guess a honeypot is better than Google, but if it works for them you probably shouldn't touch it.
Also you took her passwords from being fully offline to hackable good job.
I could invite you.
I meant relatively as it's more of a nerd thing to use custom ROMs, and you would usually have more experience with this kind of thing.
My issues are things nobody has cared enough to try, or impossible to fix idk.