I had the same issue in my M31, and got feedback from the customer care to contact service center after the lockdown. pathetic never ever buy any samsung product.

Samsung customer care guys called me and told me to visit service center after the lockdown period. meaning, the worst ever customer care. cheap chienese products are much more reliable than these. if they themself release buggy software update and a...

is this method legal? meaning, will the warranty void if we perfomr this?

Same problem for me. previously I owned all chinese phones and never had any issue. Being Bigger brand, if you are unable to push proper patch for the update, then you guys are not better than any cheap chinese brands.

same here during the update it hung after an error message, build id does not match..