Answers to some of your questions about ringtones and email and text notifications on your Samsung Galaxy S III 4G LTE
How do I change the phone ringtone and notification sound on my Samsung Galaxy S® III 4G LTE?Change the phone ringtone and notification sound
Can I use custom ringtones on my Samsung Galaxy S III 4G LTE?
Yes, you can. You may need to install a ringtone application from Google Play Store™. Refer to the application's specific instructions to set the ringtone.