So my iPhone 6s screen went black and I have no working home button, at the time I had no laptop to download the recommended applications to fix the problem, after spending about 30 minutes fiddling with the phone I discovered that pressing the power off/on button multiple times in succession a screen comes up asking “power off, medical ID and emergency call” I simple swiped power off and my phone is fixed (for now lol)
you have to press the power off button like 10 times as fast as you could. I hope it works for you :)