Oh, haha, yeah, I tried some stuff in ADB, too, but I think I want to keep the phone a bit longer. Thanks for your answer!

Did you find a way to get rid of that full screen update notification?

It’s a threat. Nobody likes the idea of crippling the economy with an unending general strike. But the people who watch the daily numbers use them to predict future behavior. A big blackout in the second month makes them think really hard about what is coming 6 months down the road. If the blackout is small, they know they don’t have anything to worry about. If it shifts 50% of sales to another day, they know they’re having a conversation with a giant that can move their numbers a lot.