I turned my iphone 4 all the way off and I tried to turn it back on and it won't come back on?

I turned my iphone 4 all the way off and I tried to turn it back on and it won't come back on?

If your iPhone, iPad, or iPod touch doesn't respond or doesn't turn on
Your device might have a frozen screen that doesn't respond when you touch it or press buttons. Or maybe your device begins to turn on, but gets stuck during start up. These steps can help.

If your screen is black or frozen
First, try to force your device to restart.
Forcing your device to restart won't erase the content currently on your device.
You can force your device to restart even if your screen is black or your buttons aren't responding.
Press and hold the Sleep/Wake and Home buttons at the same time for at least 10 seconds until you see the Apple logo.

If your device still won't turn on or start up
Plug in your device and let it charge for at least 1 hour.
After a few minutes, you should see the charging screen.

If you don't see the charging screen within an hour, or you see the connect to power screen, check your connector, USB cable, and power adapter. Make sure that everything is plugged in firmly, free of debris, and not damaged. You might want to try a different USB cable or power adapter.

If your device still won't turn on, see what to do next.

If your device turns on but gets stuck during start up
You might see the Apple logo or a red or blue screen for a long time during start up. Try these steps:
Connect your device to a computer and open iTunes. If you don't have a computer, you can borrow one, or go to an Apple Retail Store or Apple Authorized Service Provider for help.

While your device is connected, force it to restart. Press and hold the Sleep/Wake and Home buttons at the same time. Don't release when you see the Apple logo. Keep holding until you see the Recovery mode screen.
When you get the option to restore or update, choose Update. ITunes will try to reinstall iOS without erasing your data.

  • My iPhone turned off by itself and turned back on while using a app? When I was on YouTube my phone just shutted off by itself then turned on. Is there something wrong with the phone. Also when I click my home button one time the phone sometimes wouldnt come on till the second click. What can I do?
  • My iPhone turned off and won't turn on at all? My iphone 4s has a broken lock button, so i can't hold down the home button and lock button to reboot my phone, and i tried letting it charge for an hour but that didn't work. What else can i do? I really need my phone on as soon as possible help
  • My iPhone turned off and won't turn back on? I set my phone down while i was on the computer, didn't use it for like 15 minutes, and when i looked at it the screen was black and it shut off. It was on like 80% battery so it didn't die. I tried plugging it in to the charger to see if i could get it to turn back on but it will not turn on. I don't know what happened!
  • My iphone has turned itself off and won't come back on? I have the iphone 4 8g and I have had it for only a month, it is well looked after and I locked the phone then 3 minutes later I tried to access it and it is off and will not come back on, I think I had received a phone call which could have frozen the phone, does anyone know what this is? The phone was purchased from an 02 store and is on pay as you go.