How do I make sure iPhone 5C is powered off - it has a broken screen
I have a 5C with a screen that doesn't work. I'd like to take the SIM card out and generally get it ready to sell, but I'm not sure how to make sure that it's completely powered off before I take the SIM out. The screen never lights up, so how can I be sure it's off? Flipping the silent mode switch on and off doesn't make it vibrate btw.
Thanks for the help!