Charge your iPhone.
Your iPhone may not have enough battery to boot up. If your iPhone has an extremely low battery, it may start to boot up and then shut off before fully booting. Connect your iPhone to a charger and let it charge for an hour or more. Then try to power it back on.
Force restart your iPhone.
Your phone may have a software glitch. Performing a forced restart can fix minor bugs and glitches. Use one of the following steps to force-restart your iPhone: iPhone 8 and above: Press the Volume Up button, followed by the Volume Down button. Then press and hold the Side/Sleep button until you see the Apple logo iPhone 7: Press and hold the Volume Down and Side/Sleep button until you see the Apple logo appear. iPhone 6 and below: Press and hold the Home button below the screen and the Side/Sleep button until the Apple logo appears.
Update your iPhone on a computer.
There was a problem updating your iPhone. If an update gets interrupted (i.e. your iPhone was shut down during an update), the update may be corrupt. You'll need to update your iPhone via a computer in recovery mode. Use the following steps to do so: Open iTunes on Windows or macOS 10.14 Mojave or earlier. On macOS 10.15 Catalina, open the Finder instead. Put your iPhone in recovery mode. This process is very similar to force restarting your iPhone Use one of the following steps to put your iPhone in recovery mode: iPhone 8 and above: Press the Volume Up button, followed by the Volume Down button. Then press and hold the Side/Sleep button until you see the recovery screen appears iPhone 7: Press and hold the Volume Down and Side/Sleep button until you see the recovery screen appears iPhone 6 and below: Press and hold the Home button below the screen and the Side/Sleep button until the recovery screen appears. : Connect your phone to your computer using a USB or lightning cable. Click your iPhone in the menu bar to the left. If you see a pop-up that says there was a problem with your iPhone that requires an update or restore, click Update. Click Check for update. Click Download and install.
Restore your iPhone from a backup.
Your system is corrupt. This may be caused by software issues or jailbreaking. You will need to restore your iPhone using a backup on your computer. Use the following steps to do so: Open iTunes on Windows or macOS 10.14 Mojave or earlier. On macOS 10.15 Catalina, open the Finder instead. Connect your phone to your computer using a USB or lightning cable. Put your iPhone in recovery mode. This process is very similar to force restarting your iPhone Use one of the following steps to put your iPhone in recovery mode: iPhone 8 and above: Press the Volume Up button, followed by the Volume Down button. Then press and hold the Side/Sleep button until you see the recovery screen appears iPhone 7: Press and hold the Volume Down and Side/Sleep button until you see the recovery screen appears iPhone 6 and below: Press and hold the Home button below the screen and the Side/Sleep button until the recovery screen appears. : Click your iPhone in the menu bar to the left. If you see a pop-up that says there was a problem with your iPhone that requires an update or restore, click Restore and follow the instructions. Click Restore backup. Select a backup with a date prior to when the problem started If you don't have a backup, you may need to factory reset your iPhone. Enter your passcode and click Restore.
Factory reset your iPhone.
Your system is corrupt. If your system is corrupt and you don't have an adequate backup, you may need to factory reset your iPhone. This will erase all data on your iPhone and restore it to its factory settings. Do this as a last resort. Use the following steps to factory reset your iPhone on a computer. Open iTunes on Windows or macOS 10.14 Mojave or earlier. On macOS 10.15 Catalina, open the Finder instead. Connect your phone to your computer using a USB or lightning cable. Put your iPhone in recovery mode. This process is very similar to force restarting your iPhone Use one of the following steps to put your iPhone in recovery mode: iPhone 8 and above: Press the Volume Up button, followed by the Volume Down button. Then press and hold the Side/Sleep button until you see the recovery screen appears iPhone 7: Press and hold the Volume Down and Side/Sleep button until you see the recovery screen appears iPhone 6 and below: Press and hold the Home button below the screen and the Side/Sleep button until the recovery screen appears. : Click your iPhone in the menu bar to the left. Click Restore iPhone. Enter your passcode and click Restore.
Repair or replace your phone.
There is a problem with your iPhone's hardware. If your phone still can't boot up after performing a factory reset, there is most likely a problem with your phone's hardware. There may be water damage or a problem with your phone's electronic components. You will need to have it fixed or replaced. You can take it to a cellphone repair technician or contact Apple Support. You can contact Apple support at 1-800-275-2273 or online at https://getsupport.apple.com/ If your iPhone is still under warranty, you may be able to have it replaced for little or no cost.
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