My iPhone screen is all black and my power / sleep button doesn't work. What do I do?

I clicked on this app & my phone turned all black all I could see was the status bar and that's it & I pressed the home button but it stayed frozen, it didn't work. & well my power button doesn't work so yeah and then my iPhone locked and now I press the home button and Siri works and everything but my phones screen is still black!

Press power+home button for 15 20 sec if apple logo appear then release and connect to laptop/pc if itunes show iphone in recovery mode then unplug and press power button if it is going to on and work then fine if no then you have to restore it by again going to recovery mode by above method. And somehow if it works first of all delest last installed apps.

  • Why doesn't my iphone's sleep/wake button not work? So my iphone's sleep/wake button feels weird.whenever i push it, it feels like i have to push it harder for it to work. Can i fix this by myself or do i have to get it repaired? And if i do have to get it repaired, how much would it be because i don't have warranty on it.
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  • My iphone 4 is in safe mode and my power button doesn't work. What do I do? I dropped my iphone today while i was getting in the car and it turns on but it only turns on for 5 seconds then it goes black again and to the apple sign and goes back and fourth from that and the battery and shows me that I have no battery.It'll do that for like 20 min. My friend told me its in safe mode and i need to reset it with the power and home button but my power button is completely broken. So I have no idea what to do.
  • Iphone has white screen black apple logo frozen it occasionally goes black then that screen shows up again screen went red once? I held the home and power buttons and it showed me that the battery was super low with the little red lines hasn't shown me that since now it's just frozen on black apple logo with white background and the screen flickers occasionally i've had it plugged into the wall charging for 2 hours now and still nothing should I go get it looked at by apple or do I just leave it charging longer?