Hello, I have a problem with my phone. Freezes and restarts repeatedly. I've already tried starting it in safe mode and restoring the factory settings, but it didn't help. I sent it to Samsung service for diagnostics, they quoted me a price for replacing the motherboard. Well, I bought the phone used and I don't have a warranty card for it, so I would have to pay for the repair myself. As far as I know, the s22ultra has a problem with restarts. Does anyone know why? what's wrong how to fix it? or is it possible to request a copy of the warranty certificate somewhere?