1. Check the software download instructions and see if there are any requirements for software installation platform and mobile phone system version.

2. Check whether the downloaded software format is correct: the software format supported by Android phones is. APK.

3. Check whether the phone's memory is full, and open the phone settings-storage-available space.

4. Check whether there are other versions of the downloaded software, find and download other versions to try (probably because the downloaded software is compatible with the mobile phone software).

5. Try to change other download methods.

6. If the mobile phone can't download any software, it is recommended to back up the data in the mobile phone and restore the machine to the factory settings.