If you need to set the ringtone, please refer to the following path: 1. How to set the system ringtone: Open Settings-(My Device/Control)-Sound-Ringtone-Select the system ringtone. 2. How to customize the ringtone: 1). Open the song with your own music player, press and hold the song to set it as a ringtone. 2). Create a new folder ringtone in the SD card (some models of mobile phones have their own ringtone folder), put songs in this folder, and then open Settings-(My Device/Control)-Sound-ringtone. Note: Please operate the dual card machine: Settings-(My Device/Control)-Sound-Ringtone -SIM Card 1/SIM Card 2- Device Ringtone.