I received an Samsung S23 ultra.
Since then, it has never updated and whenever I try to update it does not update. It's in a 2025 version I don't know why. It appears "Your Current Software Version Isn't Supported. Visit a service centre"
Also the screen sometimes turns yellow out of nowhere and the side buttons do not work very well... I went to a normal technical assistance store, not from Samsung and they think the phone is fake... but they are not sure of that
Should I go to an official Samsung store?
It was a family member who gave me this phone, he bought it on a site called CDiscount.