You can set an MP3 file as the default message alert tone on a Samsung Galaxy Y smartphone by adding it first to the Notifications folder on the SD card.
Adding an MP3 File to Message Alert Tones
Make sure the music file is saved on the phone’s memory card before doing the steps below.
1. Go to Apps Menu > My Files. Open the folder where the music file is saved. For example, Media.
2. Tap and hold the file for two seconds until the hidden system commands pop up.
3. Select Copy or Move.
The file will remain in its original location if you choose to copy. Otherwise, select “Move”
4. The system will list the available folders to paste or move the audio file after which. Select the Notifications folder and tap either Paste or Move Here
Redo steps 2 to 4 to add another file.
No Notifications folder? You can create it manually. On MicroSD card’s root directory (/sdcard), press the Menu Key* then select Create Folder. The folder name should be “Notifications” without the quotation marks.
Changing The Default Message Alert Tone
1. Go to Messages. Press the Menu key then tap Settings.
2. Scroll down. Tap Select Ringtone.
3. Find and select the music file you’ve just added to the list. Press OK to save.
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Tip: AAC is supported in Galaxy Y. Hence, you can use an audio file you’ve purchased from the iTunes Store as an alert tone.
*Menu key is located beside the Home button.