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iPhone downgrade tutorial (how to downgrade the iPhone system version?Casino Plus) The upgrade of the iPhone system version is a feature that everyone likes, because the new version will always bring some new features, UI and security updates. However, when we upgrade the version of iPhone, we may find that some applications are no longer compatible or we no longer like the new system version. In this case, downgrading the system version of the iPhone has become an option. This article will introduce how to reduce the iPhone system version. Before we start, we need to know some important information: after downgrading the system version of the iPhone, all data will be lost, so be sure to back up before downgrading.In addition, please make sure that you have the corresponding firmware file and recovery tool. For security reasons, it is recommended to make a full backup before downgrading. Step 1: Check whether the device allows downgrade. First, you need to determine whether your iPhone can be downgraded. Check the model number and firmware version of your iPhone one by one, and whether there is still an iOS version that can be downgraded. At the same time, make sure that your device is not locked. Step 2: Download the file for the model and firmware version. Once it is confirmed that your device can be downgraded, you need to download the corresponding firmware file. You can go to the IPSW (iPhone System Software) download platform, find the version you need to downgrade, and then download it. After the download is completed, please make sure to save the file in a safe place. Step 3: Install the necessary recovery tool. Download the recovery tool from Apple's official website: iTunes.Make sure you are using the latest version of iTunes. Open iTunes and connect your iDevice to your computer. At this time, iTunes will detect your device. You can click the icon of the device and select "Restore iPhone". iTunes will prompt you to restore your device to the latest iOS version. Here, you need to hold down the "SHIFT" or "OPTION" key on the keyboard and click "Restore iPhone" at the same time. A browser will pop up. You can find and select the firmware file here. iTunes will start to restore the iPhone and automatically downgrade it to the specified iOS version. Step 4: It may take some time to restore the device and set up, depending on your model, firmware version and computer performance.The iPhone may restart several times during the recovery process. After the recovery process is completed, you need to restart your iPhone and set it up. Here, you need to select the language, WiFi network, and your Apple ID, etc., and follow the prompts to complete the setting. In summary, downgrading the iPhone system version is not an easy-to-operate process. It requires you to have certain technical capabilities and adequate preparation for recovery tools. These steps may take you a lot of time, but as long as you follow the above steps, you can successfully downgrade your iPhone system. Please remember to back up your data so as not to lose important information during the downgrade process.

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