[Q] P-700 Change endcall sound topic

Hello everybody!
I just want to know if i can change the horrible endcall "beep" on my lg P700. On my old GT-i5800 (Froyo) I managed to change it by searching in phone.apk but on 4.4 it's different so i've extract all system apps but nothing. Nothing too on UI folder. Someone have an idea?

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