Quickly press and release the volume down button. Hold down the side button until the Apple logo appears, and then release the side button (it can take up to 20 seconds). If the update or restore never completes or the device doesn't respond, force the device to restart. The first thing to try when your iPhone crashes during an update is to put the device in recovery mode and then try to update it again.
The following simple steps will show you how to do this. You can take it to the nearest Apple support center and they will fix it for you, but if your iPhone has an expired warranty, the company will charge you a lot of money to repair the device. Always, one of the most effective ways to fix iOS problems, including the iPhone update stuck when installing iOS 17, is to force the iPhone to restart. If you try to update your iPhone when you're using a poor Wi-Fi connection, you'll cause problems because your iPhone won't update and it freezes.
In addition, the iPhone gets stuck on the software update screen or the iPhone update crashes when installing iOS 17. For iPhone 7 and 7 Plus, turn off the iPhone and, while connecting it to the computer, hold down the volume down button until the recovery mode screen appears. First of all, let's learn how to fix a new iPhone stuck on the software update screen, either from your iPhone or from your computer.