My iPhone 6 Won't Turn On! Here's The Real Fix.

1. Press and hold the power button and the volume down button together until the screen goes blank and the Apple logo appears on the screen.
2. When the Apple logo reappears, let go of both buttons.
3. When your iPhone turns back on, the hard reset is complete.

Hard Reset On iPhone X or Newer

Hard reseting an iPhone X is slightly different than other models of the iPhone.

1. Quickly press the volume up button.
2. Quickly press the volume down button.
3. Press and hold down the Side button.
4. Release the Side button when the Apple logo appears on the center of the screen.

1. Charge your iPhone with multiple different power sources. If you normally use your wall charger, try using a USB port on your laptop, and vice versa.
2. If your iPhone charges with one power source but not the other, then you know that the charger is causing your problem.

How To DFU Restore An iPhone SE, 6s, Or Older

1. Using a Lightning cable, plug your iPhone into a USB port on your computer.
2. Open iTunes if you have a PC or Mac running Mojave 10.14 or earlier. Open Finder if you have a Mac running Catalina 10.15 or newer. It doesn’t matter if your iPhone is on or off.
3. Press and hold the Home button and the power button simultaneously.
4. After 8 seconds, release the power button, but continue to hold the Home button.
5. Let go of the power button when your iPhone appears in iTunes or Finder.
6. Your iPhone’s display will be completely black if you’ve successfully entered DFU mode. If it’s not, try again from the beginning.
7. Restore your iPhone using iTunes or Finder.

How To DFU Restore An iPhone 7 Or 7 Plus

1. Using a Lightning cable, plug your iPhone into a USB port on your computer.
2. Open iTunes if you have a PC or Mac running Mojave 10.14 or earlier. Open Finder if you have a Mac running Catalina 10.15 or newer. It doesn’t matter if your iPhone is on or off.
3. Press and hold the power and volume down button simultaneously.
4. After 8 seconds, release the power button, but continue to hold the volume down button.
5. Release the volume down button when your iPhone appears in iTunes or Finder.
6. You'll know your iPhone is in DFU mode if the display is completely black.
7. Restore your iPhone using iTunes or Finder.

How To DFU Restore An iPhone 8 Or Newer

1. Connect your iPhone to your computer using a charging cable.
2. Open iTunes (PCs and Macs running macOS 10.14 or older) or Finder (Macs running macOS 10.15 or newer).
3. Quickly press and release the volume up button.
4. Quickly press and release the volume down button.
5. Press and hold the side button until the screen goes black.
6. When the screen goes black, press and hold the volume down button while continuing to press and hold the side button.
7. Hold both buttons for five seconds.
8. After five seconds, release the side button while continuing to hold the volume down button.
9. Keep holding the volume down button until your iPhone appears in Finder or iTunes.
10. Restore your iPhone using iTunes or Finder.

How To Repair Your iPhone With Apple's Mail-In Service

1. Visit Apple's support website to begin the online mail-in repair process.
2. Alternatively, call 1-800-MY-APPLE (1-800-692-7753) to set up a repair.

How To Repair Your iPhone At The Genius Bar Inside Your Local Apple Store

1. Visit Apple's website to make a Genius Bar appointment before you go into the store. Apple Stores are extremely busy, and if you don't have an appointment, you may have to wait for hours or end up being turned away. (Editor's note: I'm a former Apple tech and we're not exaggerating — please, do yourself a favor and make an appointment first!)
2. When you arrive, go to the Genius Bar to check in for your appointment.
3. Genius Bar appointments always include free diagnosis. If you're under warranty, many repairs can be done on the spot, but it all depends upon which parts are in stock. If you're not under warranty, the Genius will give you a quote for the cost of a repair.