So you're wondering if it's possible to downgrade your iPhone 6 from iOS 12 to iOS 9? Let's dive into this interesting question and see what options you might have.
First off, the ability to downgrade your iPhone's operating system is not officially supported by Apple. Once you've updated to a newer version of iOS, going back to an older one can be tricky. That being said, there are some factors to consider if you're determined to give it a shot.
One important point to note is that Apple usually stops signing older iOS versions shortly after a new release. This means that even if you have an iOS 9 firmware file, Apple may not allow your device to install it since they're no longer verifying that version.
However, if you had previously saved the SHSH blobs for iOS 9 when it was still signed by Apple, there may be a workaround. These SHSH blobs are unique digital signatures that can sometimes help in downgrading your device, but it's a technical process and not for the faint of heart.
Another factor to consider is compatibility. iOS 12 likely introduced changes and optimizations for your iPhone 6, and reverting to iOS 9 might lead to performance issues or compatibility problems with newer apps. It's essential to weigh the pros and cons before attempting the downgrade.
If you're feeling adventurous and still want to proceed, you'll need to have the necessary firmware file for iOS 9, SHSH blobs (if available), and the appropriate tools for the job. Keep in mind that this process can be complex and risky, so proceed at your own discretion.
In the event that Apple is still signing iOS 9, the process might be slightly easier. You would need to put your iPhone 6 into DFU mode, connect it to a computer, and use iTunes to restore the device with the iOS 9 firmware file. Just remember to back up all your data before attempting such a significant change.
It's also worth mentioning that downgrading could void your warranty, and there's always the possibility of bricking your device if something goes wrong during the process.
In conclusion, while it may be technically feasible to downgrade an iPhone 6 from iOS 12 to iOS 9 under certain circumstances, it's not a straightforward or risk-free endeavor. If you decide to proceed, make sure you do thorough research, follow reliable guides, and proceed with caution. And remember, always back up your data before attempting any major software changes on your device.