On the s21 ultra, is there a way to lock all buttons and the screen so that they don't operate while getting bumped in my pocket? I picked up my phone out of my pocket and there were 35 screenshots that it took.
There is the option to prevent interaction when the phone detects it's in a pocket, yes. Just go to your Display Settings and find the 'Accidental touch protection'. This is not completely fail-proof, but it does help!