Default Change Lg G2 USSD Notification Sound?

I tried everything but the ussd sound doesn't change, normal message sound has changed though. I even deleted the Life is good audio file but still when I get a ussd message it notifies with the life is good sound. Please help me.
I am using the stock rom.

Thank you.

Sent from my LG-D802 using xda app-developers app

LG G2 - Stock (Rooted & Debloated)
Samsung Galaxy S4 - Stock
Samsung Note 8.0 - Stock (Rooted)
iPad 4 - (Jailbroken)