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Connect Samsung Galaxy Round to computer
Open "Galaxy Note 3"
Open "Phone"
Open "Ringtones"
Drag your ringtone into this folder
Back to "Phone"
Open "Notifications"
Drag your notification sound into this folder
Swipe down from the notifications bar, tap the "Settings" icon
Tap "Device" tab
Tap "Sound"
Tap "Ringtones"
Choose the ringtone just put in "ringtones" folder and tap "OK"
Choose the start time of ringtone
Tap "Default notification sound"
Choose the notification sound just put in "notifications" folder and tap "OK"