If you remember, I've taught remove jailbroken with Cydia Impactor and the original iOS version too long ago. The advantages of using Cydia Impactor, now renamed as Cydia Eraser is.
This means for example that if you jailbreak iOS 9.3.3 already averse to purge or delete Cydia released iOS 9.3.3, but still want to have the original (which will wash through iTunes if you have iOS 9.3.4. or iOS 10 itself) can use the app's delete this jailbreak of the device.
How to install Cydia Eraser
Of course, the device must be jailbroken with Cydia, and then search the Cydia Eraser.
Select Modify top right corner and select Install> Confirm.
After installation is complete, select the Return to Cydia and then go to Home.
Step 4: After the installation is complete, go to the Home screen. You’ll find a new icon labelled ‘Eraser’. Tap on it to launch the app.
Step 5: Read all the instructions on the screen and tap on “erase all data, unjailbreak device”.
Step 6: A prompt appears for confirmation. Tap on Erase All to proceed.
Step 7: Your device will reboot several times during the process. Make sure not to interrupt it while it’s working.
Step 8: Once completed, you will be taken to the welcome screen where you can setup your iOS device afresh and activate it. You can also restore from your backup during the setup process.
After following the above steps successfully, the Pangu jailbreak will be removed from your iOS 9.3.3 device and you’ll return to the stock firmware without being jailbroken. Your device will remain on the same iOS version as before, but with the jailbreak removed.