The Ringtone Duoduo software provides you with a variety of mobile ringtones, which you can use for free. However, many friends are not very clear about the system version of the software, so the editor of Source Code Network will teach you how to check it.
1. First open Ringtone Duoduo and click on my page.
2. Then click the settings icon in the upper right corner to enter.
3. Finally, click About Us below to enter.
Do you like the relevant introduction brought by the editor? If you like it, please pay more attention to the source code network .