Once the downgrade iOS process has been finished, your iPhone will have a clean copy of the previous iOS version or the . ipsw file you downloaded. Then, you must restore the backup you created earlier to access your data, messages, photos, apps, etc.
Downgrading iOS means re-installing an old OS on your iPhone/iPad and will wipe your device to the factory settings. So it would be better if you backup before downgrading with iTunes or iCloud or data management tools like UltFone iOS Data Manager, keeping your important data from loss.
If the downloaded file is compatible with your device and still signed, the iOS downgrade should process without errors.
If you regret to upgrade iOS 16, you only can downgrade iOS 16 to 15 through the iTunes or the third party tools like Tenorshare ReiBoot. ReiBoot can remain all your data intact and secure You don't need to jailbreak your iPhone or install iTunes on PC in the process.
Hold Shift key in Windows or the Alt/Option key in Mac and select the Check for Update option. In the dialog box, select the iOS 14 IPSW file. Click Update when prompted to update iPhone/ iPad to iOS 14.
Remove and download the update again
If you still can't install the latest version of iOS or iPadOS, try downloading the update again: Go to Settings > General > [Device name] Storage. Find the update in the list of apps. Tap the update, then tap Delete Update.
And although they haven't been released yet, Live Activities and the iCloud Shared Photo Library are two iOS 16 features that may also drain your battery, so look out for an update to this story on how to disable them.
If you plan to go straight to iOS 16, you don't need to download iOS 15.7 first. The bug fixes mentioned within the release notes are all contained within iOS 16 too. You can just hit the Upgrade to iOS 16 option that sits below iOS 15.7.
New Software Must Be “Actively Signed” By Apple
To install software on the iPhone or iPad, software must be signed by Apple. This means that other operating systems like Android or Linux cannot be installed on Apple smartphones or tablets, only Apple-approved software.
Jailbreak for iOS 15 and iOS 16
According to the developers behind the new jailbreak tool, it works with any version of the operating system from iOS 15.0 to iOS 16.2, which was released this week for users.
Things You Should Know
Navigate to the iPhone Software site and select your device and model. Click the older update link (usually at the top of the list). Download the file. It will take ~30 minutes.
DFU doesn't void your warranty. Jailbreak will however cause you to not receive any sort of technical support from Apple until the device is put onto the latest public release of iOS.
iOS 16: Why you should wait
No iOS release is bug-free, and it's always possible that you're going to run into problems you didn't have before. That said, between the new features and security updates present in iOS 16.1 and beyond, we really think most users will be much better off if they grabbed the latest version.
Apple's iOS 16 is a superb enhancement of the iPhone operating system with deep Lock Screen customization options, significant Live Text improvements, and support for physical security keys.
This update is recommended for all iPhone 14 and iPhone 14 Pro users and provides important bug fixes including the following: iMessage and FaceTime may not complete activation.
Though Apple's iOS updates are not suppose to delete any user information from the device, exceptions arise. To bypass this threat of losing information, and to quell any anxiety that may accompany that fear, back up your iPhone before doing an update.
Just remove the beta profile from Settings > General > VPN & Device Management, and when the next version of iOS is available, your iPhone will download and install it automatically (if you have enabled Automatic Updates), or you can do it manually from Settings > General > Software Update.
It will wipe the existing data on your iOS device by resetting. So, if you don't backup beforehand, you will end up losing the data stored on your iPhone. Even if you have a backup on iTunes, you cannot restore it 100% due to compatibility issues.
Go to Settings > General > [Device name] Storage. Find the update in the list of apps. Tap the update, then tap Delete Update.
To downgrade from iOS 15 to 14, you first need to download the right version for your model of iPhone. Navigate to the iPhone Software site to get authorization to implement the downloaded iPhone Software (IPSW) file. Apple typically offers authorization for up to a week after a new iOS version release.