Chosen Solution
Recently my phone has had the Restart Instruction , “To restart your phone, press and hold power and volume up buttons for 10 seconds” popping up all the time without me even trying to restart my phone. I try to take it off by hitting the screen on/off button and it goes away after a few click, but it ends up coming back. I’m still able to use my phone but the message is right in the middle of the screen so it makes it hard to see what i’m typing. When I hit the home button while the message is still on, it’ll take a screenshot. Also sometimes when the message goes away and it looks all clear, I hit the home button and it still takes a screenshot. Like if the message was still there just invisable. It’s been happening for a while and it’s gotten very annoying and frustrating
Simply because your ON/OFF Button (top-right) is stuck in ON! The fix:push it repeatedly while nudging in back and forth with finger nail. Worked for me. Could be that standard skin grime made it stuck. If this problem returns I think I will exchange this beast of a button.
Best option is to back up your data and wipe your phone. This will hopefully rid of what ever is doing that
I had this exact problem after doing a micro USB replacement yet it somehow went away (button might’ve been stuck since I slightly damaged the plastic piece during reinstallation given it’s loose in the metal case)