1. The most common is that the unknown software installation failed.
Unknown source, if not open we can only install the Android Market download software, if we download from the Internet can not be installed, the unknown source open method is selected in the mobile phone security settings.
Workaround: Set installation permissions (figure)
2, the installation software prompts insufficient memory
This is usually a long time to use the phone software installed more or other causes of insufficient memory.
Solution: Also very simple, free cell phone memory space can (by removing some useless tripartite program can)
3. System Facilities reasons
The system reason does not need to say that everybody only then upgrades the system to be possible, because the Android software has some requests to the system, downloads may the official look at the lowest system version.
Solution: Through the brush machine upgrade to solve
4, installation file parsing error.
The Android system only supports files in APK format, and other names are not installed properly.
5, the security software in mobile phone has caused
Installation software can limit the phone installation software, which is sometimes misjudged, resulting in our inability to install the software.