So, I just learned about this the very, very hard way.
After buying a second hand S10 and finding american ones can't be unlocked, traveling 4 hours to buy another one after much research, much annoyances to unlock it (samsung requires you to be online, which I didn't know) and testing multiple ROMs, I finally read this page more properly https://wiki.lineageos.org/devices/beyond1lte/ which says "known quirks: IMS". I thought it was just something like dolby sound.
What it means is that it doesn't suport VoLTE and most currently used phone systems. Samsung made their proprietary mess, unlike most other developers, which means it will probably never have an open source version.
And that applies to ALL modern samsung phones. I had samsung phone before with a custom OS, but didn't realize because VoLTE wasn't mandatory back then. Now it is here in Australia, and many countries. So if you ever plan to buy a samsung phone to degoogle it, know that it won't make phone calls. SMS and mobile data also doesn't work.
I don't know how I missed this. It should be talked more often given how popular samsung is. There should always be a warning "YOU WON'T BE ABLE TO MAKE PHONE CALLS IN THE FUTURE IF YOU CONTINUE".
S10 was the last decent phone ever made (for me). Not too big, SD card, headphone jack (one of the most important things for me), good camera, etc, etc... That's why I was so persistent to find one to degoogle.
So I'm stuck with my amazingly shitty pixel 5 (and other ones are even worse for me). And considering the possibility of a life without smartphones at all, since this is a losing battle. Mainstream doesn't care and evil companies have every incentive to kill freedom. It has been getting really bad and it will just get worse. But anyway... this post is not about this.
Be warned, if you care about freedom don't ever buy samsung again. Not because they are evil (they are), but because you won't be able to make phone calls on your "phone".
Isn't it odd that a Google phone can be de-googled but a Samsung phone can't be de-googled?
the writers are throwing everything at the wall these seasons
You may be new to this insanity, so I'll explain; Yes, crazily enough google pixels are (for now) the easiest mainstream phones to install a different system. Almost (as far as phones go) as easy as installing Linux on a pc to get rid of windows.
But note that this is what we mean by degoogling, installing a new system. If you don't want or can't do this (and most users wouldn't know how), it's as hard, if not harder to degoogle than other phones. All the spyware is deeply integrated and getting rid of it is impossible.
I suppose this is because google is trying to stay true to the initial vision of android, back when they had "don't be evil" lie as a moto. But I don't expect it to last.
On my end, pixel5 was my first and last pixel. It's a shitty line of phones, and I don't want to rely on google, regardless if they will allow you to install something else for long.