My iPhone 6s plus just shut off, how do I get it back on?

Alright, so I was watching YouTube on my phone. Then suddenly the screen just went black and shut off. I was aware that the battery wasn't dead, so what could have caused the issue? I had smashed the screen slightly recently, though I had it replaced fully and fixed. I've tried charging it and holding the home and off button for 10-20 second, but nothing happened! Any ideas of what I should do?

Try holding down the home button

Contact Apple Support. If you bought it from them directly, they should replace it. If it's on contract, contact the company. Even if it's not on Apple Care or in warranty, legally they should replace it within 7 years of the sale.

Apple wants you to keep buying new phones.

  • My Iphone 4 shut off randomly and won't turn back on? - 1 I've searched the internet and found the same answer: hold the sleep/wake button and the home button at the same time to reset the phone. Now the only bad thing is that my sleep/wake button is broken… So I have no idea what to do. I have the latest iOs update. I don't know maybe it will randomly turn itself back on
  • My laptop randomly shut off and now it won't turn back on? What's wrong with it? Do I have to buy a new one? I'm so confused. P.S. I'm typing this from my iPhone. I took the battery out and now it's working again. Yea! If I put the battery back in though, will it still work?
  • My iphone has a black screen after jailbreak just completely shut off? I have tried restoring but it gives me errors and I tried all the buttons and hard resets and all that stuff didn't work. Tried redsnow to boot and tiny umbrella to fix recovery but never worked but still nothing? I can hear sounds but just nothing will show up nothing just pure balck it doesn't even get lighter.
  • My iPhone 4s won't shut off, it just restarts after a few seconds? When I shut my phone off I slide the "slide to power off" thing it's circle pops up like its shutting off and then after a second the apple icon pops up and the phone turns back on.