From a Home screen, swipe up or down from the center of the display to access the apps screen.
These instructions only apply to Standard mode and the default Home screen layout.
Tap Messages .
If prompted to change the default SMS app, tap YES to confirm.
From the Inbox, tap the message containing the ringtone.
Touch and hold the attachment box.
Tap Save attachment.
By default, the sound file is saved to 'My Files/Downloads'.
To view the sound file as a ringtone option, it must be moved to 'Internal storage/Ringtones'.
You can use My Files (Apps > Samsung > My Files) to move files.