How to Set SMS Alert Tone for Single Contact/Set Custom Notification Sound for One Contact Assign different message ringtones to particular contacts. You can assign a specific SMS ringtone to each individual contact in your list. Like this you will be able to identify who is texting you without even looking at the screen of your android device.

Assign Custom Text Tone for Different People
1. From the Home screen, touch SMS App.
2. Then, select/search contact.
3. Touch the contact you want to assign a specific ringtone.
4. Tap on three dot in the upper right corner.
5. Now tap "Notification sound".
7. Tap on a "Tone" to apply.