1, information-more-settings-notification-sliding on-prompt tone-just select the required ringtone;
2. If you need to customize the SMS ringtone, save the song to the Notifications folder under the root directory (if not, please create a new one), and then set it according to the path of 1.
How to adjust the volume of the mobile phone: There is a physical volume button on the side of the mobile phone, which can be adjusted directly. Or go to Settings-(My Equipment/Device)-Sound-Volume-and adjust yourself according to the options. Include music/video/games and other media, ringtones, notifications and system sounds.