Why two different SMS notification sounds?

[Android Central Question]

I have changed my SMS notification so I can tell when I get a text. No problem here. However, about half the time when I receive a SMS message the notification sound is the phones default sound, not the one I programmed for SMS. I can't seem to figure out why it randomly plays the wrong sound. Any ideas?
Android 8.1.0

 

[methodman89]

Are those messages from apple phones?

 

[netra1492]

Doesn't seem to matter whether Apple phone or not.

 

[B. Diddy]

Welcome to Android Central! If those messages are from existing message threads, and you changed your default tone after that message thread started, then that thread is probably still using the old default. When you start a new thread, it'll use the new default you set.

You should be able to change the notification tone of a specific thread to whatever you want.

 

[methodman89]

Do the unwanted notification sounded ones all contain mms also, or just text?

 

[netra1492]

B. Diddy may be on to it. Some were old threads. I have deleted all my old threads, and so far..... all SMS have came in using the new notification tone. May take a few days to confirm this.