First, determine the software you want to downgrade. Take Bai Mo wifi as an example. Then find the application market. (The application market can be made by a third party or by the system itself)

1 Open the application market, click the position as shown in the figure, and enter the management interface.

2 Click Installed.

3 Find the software to be downgraded and click in.

4 Slide down and select Enter Version History.

Just choose the version you want to downgrade!

"APP generally refers to mobile phone software. Mobile phone software mainly refers to the software installed on smart phones, which improves the shortcomings and personalization of the original system. The main means to improve the functions of mobile phones and provide users with a richer experience. The operation of mobile phone software needs the corresponding mobile phone system. As of June 20 17/day, the main mobile phone systems are: Apple's iOS, Google's Android system, Saipan platform and Microsoft platform.