After the civil war completes, Emperor Walz declares the entire nation will now be known as Minnesota in a show of unification to the rest of the world.

If it’s still under warranty, they HAVE to unless they can prove your modification caused the system to fail. It’s no different than the silly stickers that say “warranty void if removed” - that’s a nice fantasy for the manufacturer, but at least in the US it’s been ruled those stickers mean absolutely nothing. If they’re refusing to fix a phone under warranty, contact your local AG and enjoy watching them squirm. Loop in the FTC for good measure.

https://www.ftc.gov/business-guidance/resources/businesspersons-guide-federal-warranty-law#Magnuson-Moss