How to upgrade to ios12 back to the official version

iPhone can update the system through a computer or mobile phone:

1. Computer: Install the iTunes software, connect the iPhone to the computer with a data cable, open the software, click the "iPhone" button in the upper right corner to enter the Apple ID, click "Check for Updates", and then you can select **Update.

The iPhone iOS system adopts the recommended upgrade and mandatory upgrade strategy to keep the latest update, and once upgraded, it cannot be downgraded.

The steps to upgrade the system are as follows:

First, the steps to upgrade iPhone system on your device are as follows;

1.Open the "Settings" icon on your iPhone when you are connected to WiFi.

2.In the settings list, click on the "General" option, and then click on "Software Update".

Second, update the system with iTunes on your computer, the steps are as follows.

1.Connect your iPhone to your computer, open the iTunes software, and tap the "iPhone" button on the top right.

2.When iTunes detects a connected device, it will automatically connect to the Internet to detect whether there is an update system available, and then automatically pop up the update update.

3.If it doesn't pop up, you can also click the "Check for Updates" button on your iPhone's summary interface.

1. The first thing you need to pay attention to is to back up your mobile phone data before you can prevent it from being lost if your mobile phone data is reconfigured and lost.

<>4. Open iTunes, click Back Up Now, and back up your iOS12 data in case of data loss after downgrading.

<>6. Next, iTunes will install the firmware from the core.

The specific operation steps of how to downgrade the iPhone system are as follows:

Step 1: Connect the iPhone to the computer through the original data cable, and then open the balance iTunes to run (you need to click [Trust] on the phone to connect the cover for the first time).

Step 2: iTunes will identify the connected iPhone, and after the recognition is completed, a small mobile phone logo will appear on the iTunes interface, click to enter the logo.

Step 3: In the interface after entering, we can see the [Check for Updates] button. Then while holding down the Shift key (for Windows) or the Alt Option key (for Mac), click the Check for Updates button.

<>Step 5: iTunes will pop up a prompt box to remind you that your iPhone will be updated to the firmware version of **, click [Update], wait for a while to enter the password on the phone, and finally wait for the update to complete.