Many users unhappy with iOS 11 and would like to go back to iOS 10.3.3. The owners of iPhone 6s had such an opportunity.
On the background of the unstable 3D Touch on the iPhone 6s after updating to iOS 11, Apple has returned the ability to roll back to iOS 10.3.3. It is unknown how many will subscribe 10.3.3 iOS, but Apple may close this loophole at any time.
The downgrade process can be performed using iTunes, but keep in mind that you will not be able to use a backup made on iOS 11. This means that when you run iOS 10.3.3 you will have the opportunity to set up the device as new or restore from a backup created on iOS 10 to update to iOS 11.
Step 1. Make sure you have the latest version of iTunes.
Step 2. Download the firmware file iOS 10.3.3 for the iPhone 6s.
Step 3. On the device, you must deactivate the function “Find iPhone”. To do this, go to Settings -> iCloud – > Find my iPhone.
Step 4. Connect your iOS device to the computer and make sure iTunes recognized it. Next, turn iPhone or iPad into DFU mode. To do this, simultaneously hold down the power button and hold Home for 10 seconds then release the power key. Once your device is in DFU mode, iTunes will notify you.
Step 5. Hold down the Option key on Mac or Shift on Windows, click “Restore iPhone” and select the firmware file that you saved earlier.
Step 6. Wait for the completion of the process of installing the OS.
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