What if N5100 does not display built-in system ringtones when setting incoming call ringtones?

The solution is as follows:

 
Symptom diagram:

1. Click application on the standby page ].

2. Click set ].

3. Slide the screen up and select application manager ].

4. Click the software you used when downloading the ringtone. Here we use "91 Assistant" as an example.

5. Click Clear default value ].

6. When you set the incoming call ringtone again, click media storage and select only once to view the built-in ringtones.