MultiPhone 5508 DUO How to set up custom ringtones and notification?

1)      Create Ringtones / Notifications folder in root directory of internal memory of the phone.
2)      Copy mp3 files into this folder.
3)      Open settings -> Select Audi Profiles -> Select General -> Select Incoming calls / Notification -> mp3 files which was copied into Ringtones / Notifications folder will be added into list of Ringtones / Notifications.