How does Samsung S3 set SMS sound?

According to your question, the operation method is as follows:

First, the phone comes with SMS ringtone settings.

1. In standby mode, click Info.

2. Press the menu key, and then click Settings.

3. Click the notification location, and then click Select Ringtone. After selecting the ringtone you want to set, click OK to save.

Second, customize the SMS ringtone settings.

If you want to copy your favorite songs and set them as SMS ringtones, please follow these steps:

1. In standby mode, click Application.

2. Select my folder.

3. Select the SDcard folder to import.

4. Select the menu key, and then select New Folder.

5. Enter a folder name in the new folder. Enter Notification as the name and press OK.

After the above operation, you can connect your mobile phone with your computer as mass storage, then copy the songs into the newly created notification folder and set them in the ringtone of your mobile phone message.