Dear Samsung users:

According to your description, we suggest you try the following methods:

1. Download the installation attempt again.

2. The software can't be installed normally due to the insufficient memory of the mobile phone. It is suggested that you move the multimedia files stored in the mobile phone to an external SD card to expand the memory space of the mobile phone and then try to install it again.

3. Unknown source is not turned on: check Settings-Security-Unknown source, and then try to reinstall;

4. Try to install after updating the version of the mobile phone system

5. Back up the mobile phone data (phone book, SMS, multimedia files, etc.), check the unknown source again after restoring the factory settings, and try to install again

If the problem remains, send the mobile phone to the nearest Samsung service center for testing and further processing. Please visit:

. samsung.com/support/servicelocations.asp

Samsung knows that it will provide you with quality solutions and answer your questions attentively, hoping to get your satisfactory evaluation.