I know you're older and not up to par on these new fancy smart phones.... but they do have this thing called a power button that turns it off.
Ha! Unfortunately, I have a business that requires me to leave the phone on 24/7. And as far as the wife... she's already half-cocked by nature... not being able to reach me would just piss her off more. Answering the phone is self preservation on my part. Lol.
All advice given is for entertainment value only. And it's free. Take it for what it's worth.