Apple's goal with iOS 12 is to fix the issues with its notorious predecessor. Of course, the change is not for everyone and according to iOS 11.4.1 Apple had a pretty stable thing. If you do not use all the bugs and new features of iOS 12, you can downgrade your iPhone to iOS 11.4.1.
Since Apple released iOS 12 on Monday, September 17, it's a good estimate that the company will stop signing iOS 11.4.1 sometime in October. When Apple released iOS 11, they did not sign iOS 10.3.3 after 15 days, so you can expect a similar timeframe. After this point, it will be impossible to downgrade from iOS 12 unless you have saved your SHSH2 blobs, which I suspect many of you have never heard of.
You can go back to the latest version of iOS 1
As with any restore, you want to disable the Find My iPhone feature. However, this can be done later when you delete the device because you are prompted to do so. It's easier to clear it out of the way first so there's no hiccup later.
First, open the Settings app, then tap your name at the top of the list and choose iCloud. Scroll down to the next page and tap Find My iPhone. Then disable "Find my iPhone". Enter your Apple ID password when prompted and Find My iPhone will be disabled.
Next, download the iOS 11.4.1 IPSW file for your iPhone from the links below. We have included iPad and iPod Touch links for your convenience. This is the firmware file you use with iTunes to reset your device. All links below come from the Apple servers, so you do not have to worry about security.
The above files are quite large, so it may take a while to download the file your device needs. If you are on a Mac, the download file should be displayed in your "Downloads" folder.
Once the appropriate file is downloaded, connect your iPhone to your Mac or Windows computer using a Lightning to USB or Lightning to USB-C cable , whichever works best for your computer. Hopefully iTunes will open automatically. If not …
You may need to unlock your iPhone. Make sure your lock screen displays the message "Unlock iPhone to use accessories". If so, unlock your device. When you first connect to the computer, you may also need to trust your computer. In addition, iTunes may ask you to install an update to connect the iOS 12 device. So make sure you do that.
Once connected to iTunes, the phone icon should appear next to the media drop-down box under Devices in the sidebar. Click one of the options to go to your Summary screen for your device.
Step 4: Install iOS 11.4.1 on Your iPhone
If you're using a Mac, hold down the option and click on the screen Summary on "Restore iPhone" for your iPhone in iTunes. Instead, hold down shift for PC users while doing the same thing.
A file browser menu appears, if so, locate the IPSW file you downloaded in step 2 and select You out. After the selection click on "Open".
Next, a pop-up will appear in iTunes informing you that iOS 11.4.1 will be installed on your iPhone. Click "Restore" at this prompt to confirm, then it's just a wait-and-see from here. During installation, you may need to enter your password on the iPhone, so do not go away while doing its magic.
When your iPhone has finally restarted and appears on the splash screen to start setting up iOS 11.4.1. It's okay to disconnect the iPhone from the computer. The rest can be wireless.
Since your iPhone has essentially been erased, you need to complete the initial setup steps.
- If you want to start over, select "Set up as a new iPhone".
- If you want all your apps and data back, you can try "Restoring iCloud Backup" as long as you have a suitable backup for iOS 11. Upgrading to an iOS 12 iCloud backup and installing iOS 12 during the Setups will not necessarily support you.
- If you want all the apps and data back, you can also go to "Restore iTunes Backup," in which case you'll need a iOS 11.4.1 archived backup. The following process outlines this step because it is not so intuitive.
When restoring from your archived backup, make sure you are still connected to iTunes and select iPhone in the application. Select "Restore Backup", then select your archived backup file from the list and click "Restore". (For an archived backup, the data and time are given in the actual backup name, unlike other backups that have only the device name.)
If your archived backup is encrypted by iOS 11.4.1, you will need to enter your password to continue.
Wait for the restore to complete before disconnecting your iPhone. It should be restarted and it needs to be synced with iTunes. Once you've completed the sync, you've successfully downgraded to iOS 11.4.1 with all your data intact.
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