1. Because it is unknown source did not open the software can not be installed, we first to open it, the specific steps in the mobile phone "application."
2. After entering, find the inside "set" button.
3. Then in the open interface to find "safe" click Open.
4. Click "Unknown source" as shown in the following figure.
5. Pop-up "unknown source" prompts, read, click "OK".
6. At this time the unknown source is checked, the following figure:
Friendly tip: If you open an unknown source or cannot install the software we can see if there are some of the following situations.
1. Samsung NOTE4 Mobile phone only supports files in APK format
2. Software and mobile phone system is incompatible, NOTE4 mobile phone use is android4.4 system, please check your software support platform.
3. If we still can not solve the phone factory to restore the equipment.