My iPhone just bricked. the screen is flickering and the phone is unresponsive to any pressing of buttons or screen taps.

Maybe this will help.

How to restart, force restart, or reset any iPhone m...

🇺🇦HighDef🇺🇦 : thanks. I tried that. it didn't work. transferred the physical SIM to my Android phone and went out. when I got home, the iphone had shut itself down. restarting took awhile, but it's working now.

is it old?

Lemongrass : It's a 6S. The latest iPhones are at 14 now. 6 was the last generation with a headphone jack. I suspect the OS crashed. It has been happening quite a bit the last few months. However, this is the first time where it just hung and did nothing for awhile.

Time for a new one?

Swamp Daddy : not in this year's budget