Setting a custom ringtone or text tone per contact

iOS

1. Open the Contacts app and select the contact you'd like to set the custom ringtone and text tone for. 
2. Click the Edit button in the top right corner. 
3. Locate the Ringtone option and click to make a selection. Press Done at the top right to set the ringtone. 
4. Locate the Text Tone option and click to make a selection. Press Done at the top right to set the text tone. 

Android 

This process may vary depending on the phone's manufacturer and software version

1. Open Contacts and select the contact you'd like to set the custom ringtone and text tone for.
2. Click the Edit Contact button. 
3. Look for the Ringtone and Message Tone options. Click to make a selection, the press Save.