It's printed quite clearly in the quick start guide that it'll break your phone if you do it. Maybe people should read the little booklet, but as you can see it's not hidden under a pile of text.
Discussion question: If something is immoral and debatably illegal, does documenting it in the quick start guide make it somehow less immoral? Or does that just mean it was documented?
> Approved firmware versions
> This device will only operate with
> firmware versions that have been
> approved for use by your wireless
> carrier and the device manufacturer.
> If unauthorized firmware is placed on
> the device it will not function
https://downloadcenter.samsung.com/content/UM/202108/2021081...