If your iDevice starts acting strangely and you have gone through the full range of typical troubleshooting fixes, the recovery mode may be your answer. This allows you to easily reset the device and reinstall iOS with the help of iTunes.
When you reinstall iOS, you may lose all data on your phone. It is therefore good to keep the habit of making regular backups on your computer via iTunes or iCloud. That said, here's how to start your iOS device in recovery mode.
First, make sure you have the latest version of iTunes
First, you must make sure to use the latest version of iTunes. With the program open, go to iTunes> About iTunes.
Note the version you are using and check it against this one. official Apple support page to see if you are on the latest version.
That done, you are ready to start. The rest of the procedure varies slightly depending on the device used. So we will examine them one at a time.
For iPhone 7 / iPhone 7 Plus or later
If you're using an iPhone 7, 7 Plus, 8, 8 Plus, X, XS, XS Max or XR, here's what to do.
First, make sure your phone is turned off. Then press and release the volume increase button.
Then immediately press the volume down button and release it.
Now, hold the side switch, the only one on the opposite side of the volume buttons. Do not let go of the button even when the Apple logo is flashing on the screen. Continue holding until the recovery mode screen appears.
Once this screen is displayed, connect your device to your computer via a Lightning cable.
For the iPhone 6 or the previous iPad
These instructions relate to the iPhone 6s and earlier models, as well as most iPad models other than the iPad Pro 11 and 12.9 inches. For these two, see the next section.
First, make sure your device is turned off. Then press and release the volume increase button.
Then hold down the Home and Sleep / Wake buttons. The Sleep / Wake button is located on the side for iPhone 6 or later users and on the top right for iPhone 5s and earlier. Do not let go of the buttons even when the Apple logo is flashing on the screen. Continue holding until the recovery mode screen appears.
Once this appears, connect the device to your computer.
For iPad Pro 11 inch or iPad Pro 12.9 inch
Press and release the Volume Up button quickly, then press the volume down button and release it quickly. Press and hold the Sleep / Wake button at the top of the device until it restarts. Continue holding the Sleep / Wake button until the iPad goes into recovery mode.
When the recovery mode starts, connect the device to your computer.
What to do once in recovery mode
Now that your device is in recovery mode, you have about 15 minutes left to shut down automatically. If you do not move fast enough and your phone leaves recovery mode, repeat the same pressures, as explained above, to enter it again.
A window similar to the one below will appear on your computer after you enter recovery mode on your phone or tablet. When you see the "Restore or Update" options, choose Update.
You might want to try "Update" instead of "Restore" because your problems could very well be solved by a simple update on your iPhone, which will retain all your content and personal settings. If this does not work, you may need to choose the "Restore" option, which will erase all your content and personal data on your device. Do not click "Restore" inadvertently if you do not have a viable backup of your data or want to follow this process and make sure to try "Update" first to save yourself some potential grief.
Choose "Update," and iTunes will work to reinstall iOS on your phone while leaving your data intact. When the update or restore process is complete, you will be prompted to configure your device.