Samsung. I have a Galaxy S20 and I love it. There are a few issues here and there but overall, the phone is great. If it wasn't for Samsung, I would probably be an iPhone user really. I don't really like the other Android devices
Xiaomi, especially the Android One series, because it has a great community, jacks, SD slot, and unlockable bootloaders, Next in line is LG. I'm lucky that my Optimus Black does not suffer anything, and they also offer things I need, the jack, the SD slot, and although limited, their unlock bootloader policy is much more friendly than Samsung.
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