For iOS users, there is normal for us that upgrade/downgrade iOS system on device to fix the software update failed error or abnormal system issue, and sometimes we may need to reset our devices to the factory setting. So, to restore above situation, we always need to install IPSW files on our iPhone/iPad.
The beta of iOS 11 released on WWDC was for developer only, so far. Tests show that there are still various problems in iOS 11, macOS High Sierra, and watchOS 4, and you should still wait for months. They may lead to device crash when installing on older iPhone and iPad.
If you have updated to iOS 11 and now regret your pity decision, here is the way to downgrade to previous OS via ipsw files. (But on Apple Watch, by the way, you just cannot downgrade from watchOS 4 to watchOS 3.)
However, do you know what’s the iOS firmware IPSW files? IPSW file is a format used in iTunes to install iOS firmware to iDevices, all Apple devices share the same file format for iOS Firmware
But for many people, they don't know how to install IPSW files on their devices, so here I'd like to show you two essential way to install IPSW files on your iDevices with/without iTunes. Besides, to prevent something goes wrong during the procedure, you’ve to make sure you have a proper backup or not. To prevent yourself from data loss, you'd better backup your data from time to time.
You may need:
Solution1. Install IPSW File on iPhone iPad With iTunes
Solution2. Install IPSW File on iPhone iPad Without iTunes
Here IPSW Download: iOS firmware file for iPhone
Step 2. Open iTunes and connect your device to the computer, then the iTunes will automatically detect your devices.
Step 3. Open Device Summary for the iOS device you are updating.
Step 4. Hold down the SHIFT [Windows] or ALT [Mac] key and click Restore in iTunes simultaneously iTunes restore.
Step 5. Locate the iOS IPSW file you downloaded and select it.
Step 6. Follow the on onscreen instructions and iTunes will begin the update process. And your iOS device will reboot into the iOS you select when the update has finished.
Note: This Method may result in some inevitable loss of files, so if you want a safe and reliable way, you may refer on the below method, which will help you to install IPSW file to restore iPhone system to normal state without data loss.
iOS System Recovery which can help you finish the iPhone restore task in a quick and safe way, and without losing anything.
Just free download the software to have a try now!
Step 1. Install the iOS Data Recovery iOS System Program on Computer
Run this IPSW Files Installation Tools and Connect iPhone to the Computer. And then click on System Recovery.
Step 2. Click "Start" to Scan the Problem of your Device iPhone or iPad.
Step 3. Select iOS 9/iOS 10 IPSW Files and Download for iPhone.Confirm the information of your device or select it by yourself.
Step3. Locate the iOS IPSW file you downloaded and select it:To install the iOS IPSW file on your iPhone, please click the “Select” button to import the files to the IPSW Files Installation Tools and going on.
Step 4. Install the iOS IPSW File to Restore iPhone.
After finishing, you will get a message prompt that your iOS device has restored to the normal state, and then it will reboot into the iOS version which you select.
Related Post: How to Reset Your Jailbroken iPhone?
On the other hand, if your device is a jailbroken one, this program will update it to the non-jailbroken.