1, let's first open the phone and find the "Settings" function on the phone, and click the Settings icon.

2. Then we enter the following interface and enter the "General" column;

3. After entering the page shown below, select the "Equipment Management Options" option;

4. In the enterprise application option in equipment management, select the description file name of the enterprise application to be installed (consistent with the prompt when opening), and click to enter according to the prompt;

5. After entering the interface corresponding to the enterprise signature, confirm the company name and application name in the enterprise signature, and click Trust (company name to be signed).

6. Then return to the page and open the application for use, so that the untrusted enterprise developer is set as trusted, and the signed application can be used normally.