1. After unlocking the phone to the home screen page, select and open Settings.

2. After entering "Settings", select "General" function.

3. Find "Description File" in the menu bar of "General" function.

4. Enter the "Profile" management setting page, and click Apply to enter the next step.

5. The system jumps out of the confirmation pop-up window and selects "Trust" to install the application.

6. After the configuration file is successfully installed, "Device Management" will appear in the general functions of the mobile phone.

7. Enter the "Equipment Management" detailed page, and you can "delete the application" or "verify the application" for the installed description file.

After installing the software with the description file, open "Settings-General" in turn, and above "Supervision", you can find the equipment management. Different versions of the iOS system may have different names, and individual versions are called "profiles".

Software with description files is generally a third-party application that is not placed on the AppStore. It should be noted that the iPhone can download third-party applications without jailbreaking. If such software is installed, there is still no option for device management, indicating that there is something wrong with the installed software.

Users are advised to add a description file to their mobile phone directly through the website, such as the description file that iOS prevents automatic update. After adding, you can find device management in Settings-General. However, if you don't want to block the update, remember to delete the added profile.

Finally, I would like to remind you that the method mentioned in this article is applicable to all models of Apple mobile phones.