How does Apple downgrade the system? Can Apple update its system after it is downgraded?

How does Apple downgrade the system? Many friends don't know about it, so today's editor will tell you something. I hope it can help you.

1. First, before Apple's mobile phone system is downgraded, please open the address ipsw.me and click iPhone on the page;

2. Then download the latest iOS firmware you want to downgrade on Apple's official website according to your phone model;

3. Connect the phone to iTunes on the computer, and iTunes will automatically identify the phone model and other information;

4. Press and hold the Home key and the On/Off key continuously until your iPhone enters DFU mode;

5. After entering the DFU mode of iOS device, continue to press and hold the Home key until your iTunes pops up a message box, and it detects that the iPhone is in recovery mode;

6. IPhone in recovery mode is detected, and the screen will be black, and it will restart later;

7. After restarting, you will see that your iPhone is in recovery mode. Click the Restore iPhone button;

8. Now we find the iOS system firmware file we just downloaded;

9. Click the Restore button, and the computer will downgrade your iPhone;

10. It takes about ten minutes. After that, click OK.

Can Apple update its system after it is downgraded?

No, once the IOS equipment is upgraded, the IOS system cannot be downgraded.

The reasons are as follows: 1. IOS adopts the recommended upgrade strategy and the latest upgrade strategy. Once upgraded, it is impossible to downgrade. 2. The mandatory maintenance of the latest system version is to prevent the vulnerability in the lower version from causing information disclosure to users. 3. Apple has launched the id lock since iOS7. The prohibition of downgrade is to prevent someone from stealing a phone and reusing it through the downgrade method, so as to reduce the theft rate of the iPhone and iPad.

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