Step 1. Open the unknown source option.
When you download a third-party application that cannot be installed, typically because the unknown source option is not turned on, the unknown source option opens with two methods of operation, as follows:
1. Under the Standby page, click "Application".
3. Slide the phone screen up with your finger and choose "safe".
4. Slide up the screen and click on "Unknown Source".
5. After reading the notice, click "OK".
1. When installing Third-party software, you may be prompted to "install is blocked", then you need to allow the installation of the non-electronic market options open, click "Set."
2. Slide up the screen and click on "Unknown Source".
3. After reading the notice, click "OK".
Step 2. Install the required software.
1. Click on the software you want to install, for example, to install "Sing it".
2. Click "Install".
3. When the installation is complete, click "Finish".
Prompt:
If the above settings are complete, the software will still not be installed, possibly due to software compatibility Cause, try installing third-party software in the other ". apk" format, or restart your phone to install it again.
