today I find my phone {S21 ultra} is stuck on the Samsung logo screen and will not change of this screen. If I hold down power + sound down it will just reboot to the same boot screen. I can't power it off and I can't access safe mode or recovery mode. Has anyone experienced this issue or go any idea how to fix it? There are no other ways I can interact with the phone other than power and sound down. I have let it run out of power entirely and tried to start in recover mode but it hasn't worked.