How to validate supplier compliance

List of catalogs of this article:

• 1 、How to flash Apple 4 to update the system version
• 2,How to validate supplier compliance Why can't the iPhone update the system
• 3, How to update the system of Apple 4
• 4, How to flash Apple 4 to upgrade the version
• 5, Detailed tutorials and notes for iPhone4 jailbreak upgrade to iOS10

How to flash Apple 4 to update the system version

First of all, we need to determine the model of our Apple 4 and the currently running iOS system version. This can be found in "About This Machine" in the mobile phone settings. If your mobile phone is already running the latest version of iOS, there is no need to flash it. Secondly, we need to back up the data in the mobile phone.

Long press the volume down key + power button, and slide to turn off the power.Press the volume up button first, then press the volume down button, and then press the power button for a long time.

Download the flash program on the computer and run the program. Connect your iPhone, and the program will automatically detect your device and display relevant information. Please make sure that you have downloaded the correct firmware version and saved it in an easy-to-find folder.

The flash method of Apple 4 is as follows: download, install and open iTunes, and put the mobile phone into recovery mode. First, press and hold the power button for a long time. When the shutdown option appears, please slide to shut down, and then press the power button to turn on. The Apple logo will appear on the screen. Do not release the power button, and then press and hold the home screen H Ome key until the screen goes black.



Why can't the iPhone update the system

Reason 1: Network problems iPhone system updates need to be downloaded online, if the network is unstable or the network speed is too high If it is slow, it may cause the update to fail. At this time, we can try to change the network environment, such as using Wi-Fi or changing other networks.

Network problems.When the memory space of the iPhone is sufficient, if it encounters a problem that cannot be updated when updating the system version, it is likely to be caused by network problems. Insufficient battery. The update of the mobile phone system also needs the support of power. Only with enough power will the mobile phone support the update.

The reason why ios can't check the update is that the device network connection is unstable or unavailable, the device operating system version is too low, the device storage space is insufficient, etc.

Reason 1: The remaining space of the iPhone is insufficient. When updating the iOS system of the iPhone, if the system cannot be updated, you should first check how much memory space is required for the latest iOS system version to be upgraded, which can be viewed in the mobile phone software update interface.

Network problem: If the mobile phone network connection is unstable or the network speed is too slow, it may not be able to check the update. Please try to connect to another network or mobile device hotspot, and then check the update again. Insufficient storage space: If the mobile phone has insufficient storage space, it may not be possible to download new system updates.

The iPhone has not been updated for a long time. It can't be updated because the mobile phone memory is not enough to meet the requirements of installing the latest system. It is also possible that the configuration of the mobile phone system is too low to update the latest system; the mobile phone is set to update only wifi, which may be because it is not connected to the wireless network and cannot be updated.

How to update the system of Apple 4

1. First of all, we need to determine the model of our Apple 4 and the currently running iOS system version.This can be found in "About This Machine" in the mobile phone settings. If your mobile phone is already running the latest version of iOS, there is no need to flash it. Secondly, we need to back up the data in the mobile phone.

2. Step 1: Check the mobile phone version. First, you need to check the current system version of your Apple 4 mobile phone. Find the "General" option in the mobile phone settings and click "About This Machine" to see the current version number. If your version number is iOS2 or lower, you need to update it.

3. Use iCloud or computer to back up your device. Plug the device into the power supply, and then connect to the Internet through the wireless LAN. Go to "Settings" and "General", and then tap "Software Update".If you see multiple available software update options, please choose the software update you want to install.

4. To update on the iPhone, first open the iPhone settings and enter it. Then open General on the settings page. Then in the general page options, click the software update option to enter.

5. The official version of Apple system iOS12 has been released, and the majority of fruit fans can choose to upgrade the system as soon as possible. Looking at the evaluation on the Internet, although there is no eye-catching function this time, it still solved a lot of problems, and the user experience is much better.

How to flash Apple 4 to upgrade the version

Check the network connection: Make sure the device is connected to the Internet, because the upgrade system requires downloading and installing software from the Apple server.Clean up storage space: Before upgrading the system, you need to ensure that the device has enough storage space to download and install the new system.

Downloading iOS firmware files is very important. You need to confirm that the file you want to download matches your device model and iOS version. You can search for "iOS firmware download" on the Internet and select a reliable website to download the iOS firmware file. Connect your Apple device, connect your Apple 4 phone to your computer, and then open iTunes.

Connect the iPhone to the computer and start iTunes. Press and hold the power key and the Home button and wait for the Apple logo to appear on the screen. Release the power button, but continue to hold down the Home button until the "Connect to iTunes" icon appears on the screen.

Detailed tutorials and notes for iPhone4 jailbreak upgrade to iOS10

1. After downloading the corresponding iOS10 firmware, return to the jailbreak tool and select "Ex Tras", and select the "Select IPSW" option in the drop-down box, select the iOS10 firmware you downloaded and import it. Next, select the "Just Boot" option. The program will start upgrading your iPhone4 to iOS10 and complete the corresponding settings.

2. Things to pay attention to before upgrading. It is recommended to do a good job of data backup before upgrading to avoid accidents that cause all the data of the iOS device to be emptied. It can be backed up through iCloud (Settings "iCloud" "Backup") iOS 10 system only supports iPhone 5 and above devices, and iPhone 4s is no longer applicable.

3. First, download the latest version of iTunes. Remember, it needs to be the latest version, otherwise it may cause unknown errors when reinstalling.

4. Method 1: OTA update, upgrade directly on the mobile phone (applicable to non-jailbreak users). It is recommended to carry out in the wifi state. Enter Settings-General-Software Update on the mobile phone, and download the update patch for firmware upgrade.

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