Remember to back up your iPhone in the very beginning because this way will erase all Stock Firmware your data. Locate and select IPSW firmware files on your computer. A few minutes later, the device will restart in normal mode.

You can update your iPhone again to see if this method has solved the problem. My iPhone won’t update, what could be the problem?

• The recovery of files from a damaged Mac hard disk is often possible only with the help of a specialized hard disk repair shop and its professional tools.
• If the previous solutions fail to solve the problem, seeking help from Apple Support is the last option for you.
• An internal error occured (Unsupported data).
• For pictures and videos repair, all the common types are suppored, including JPEG, PNG, BMP, MOV, MP4, GIF, and more.
• Without a good internet connection, your download may take a longer time or even fail.

The updater does not know how to handle them. This firmware is too old, make sure you have the latest version and try again. An internal error occured (Version mismatch). The product could not store the firmware in its memory.

• Use the free iPhone data recovery software – MiniTool Mobile Recovery for iOS to recover its data after fixing your device.
• It supports the latest iOS and all the iPhone and iPad models.
• Public or company Wi-Fi networks may not work to restore your Apple Watch.
• Updating failed due to version mismatch.
• If you don’t see the “Check for Updates” button, it means the iTunes is downloaded from Microsoft Store, and the Store will automatically update it.
• Go to Microsoft Store and search for iTunes.

On the main page, you will see options and from there, select the “Standard Mode” option. The terms firmware and operating systems are used by many people interchangeably. A more detailed understanding of these matters finds that this two are different. And from firmware, the operating system can exist independently. During use, the firmware of a phone remains unchanged usually.