2. The downloaded software installation package may be incomplete. Please download and reinstall.

3. The version of the installed software may be lower than the existing version, or it may be caused by software compatibility problems. Please change to another version or download and install other software again.

4. The software format supported by 4.Android phone is APK, so you can download the software in other ways. For example:

1). Use the browser in the mobile phone menu to surf the Internet and directly search for the required software to download and install.

2). Use the app store that comes with your phone to search for and install the required software.

3) Install 9 1 assistant, 360 assistant, etc. In your mobile phone or computer, find the needed software through this kind of software and try to download it.