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3uTools Supports Downgrade iPhone 6s to iOS 10.3.3 from iOS 11

11/08/2017

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Apple has stopped signing both iOS 10.3.3 and iOS 11.0. Fortunately, iPhone 6s users are allowed to downgrade iOS 11 to iOS 10.3.3. Here’s how you can downgrade back to iOS 10.3.3 on iPhone 6s. 


3uTools Supports Downgrade iPhone 6s to iOS 10.3.3 from iOS 11


Important Note:

1. Please customize back up the important data like contacts and photos of your iDevice. You are not suggested to downgrade with data. 


2. You could customized restore your backing up data to your iDevice after downgrade.


3uTools Supports Downgrade iPhone 6s to iOS 10.3.3 from iOS 11


Operations:


Step 1 Launch the latest version of 3uTools, and connect your iPhone 6s to your PC. Click Flash & JB -> Easy Flash, 3uTools will automatically match the firmware after you connect.


Step 2 Click firmware iOS 10.3.3 and “Flash”. Then, 3uTools will download the firmware and begin flashing. If you have downloaded the firmware before, just click “Import” -> “Flash”.

 

3uTools Supports Downgrade iPhone 6s to iOS 10.3.3 from iOS 11


Step 3 Keep a good connection between your iDevice and your PC and wait patiently till the process finishes. Your iDevice will reboot if it is successful.


3uTools Supports Downgrade iPhone 6s to iOS 10.3.3 from iOS 11


Share your experience in 3uTools Facebook group to help more users.

Windows
Mac OS
iOS
Linux
3uTools
Win 64-bit For this device
V9.0 2025-11-11
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Win 32-bit For this device
V9.0 2025-11-11
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3uTools V3.18
2025-09-18
Please use the 3uTools PC client to install the iOS client:
1、 Install either the Windows or Mac version of 3uTools on your computer
2、 Open the PC client and connect your device to the computer via USB cable
3、 After the connection is successful, wait for the computer to automatically install the mobile app for the device, or locate “Install Mobile App” on the computer and manually click to install.
3uTools
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3uAirPlayer
Win 64-bit For this device
V6.0.2 2025-11-19
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Win 32-bit For this device
V6.0.2 2025-11-19
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iOS Device Mirroring (No App Required)
1、 Install 3uAirplayer on the Windows PC
2、 Open Control Center and select Screen Mirroring
3、 From the list, choose your PC to start mirroring
4、 Or connect your iOS device to the PC via USB to begin mirroring
Scan to get "3uAirPlayer" App