I want to change the notification sound for each event like email, FB, SMS so it plays the sound I like and differs for each one from the other, is there a way to do this?
Searching for it, led me to the fact that I can do it but I'm not sure how and there was nothing which seems the right thing to do.
Best Answer
Open Settings.
To change the system's notifications, navigate to General > Sounds:
Currently there is no way to set apps' notifications unless there is a setting within the app. I recommend you thoroughly look through the apps' settings if you want to do this.
Edit: In regards to our conversation in chat about this topic, here's some more info.
System apps, again, you can change using the above method. Other apps depend on a per-app basis: It is entirely the developer's choice whether to support functionality for customizing notification tones. Facebook, for instance, does not.