1.apple App cannot verify its integrity because its signature or certificate has been lost. Users only need to find the general description file in the phone settings and install the description file.

2.Apple cannot verify its integrity because the signature or certificate of the application has been discarded. Users only need to find the general description file in the phone settings and install the description file. Open Settings and click General. Select a profile. Click Install Profile.

3. Network interruption or abnormality. In this case, users can check whether the network connected to their mobile phones is stable and the speed is normal. You can try to switch to another website, or change to a Wi-Fi, or switch from Wi-Fi to a 4G/5G mobile network, and then try to reinstall. Flashback after installation.

4. Open Settings Click "Settings" on the phone desktop to open "Phone Settings". Open General On the Phone Settings page, click General to open General Settings. Device Management On the General Settings page, click Device Management to open Device Management.