How to change the find my iPhone alert sound to some other sound?

My phone is jailbroken. Is there a way to do this through iFile or tweak? Yes? No? And why?

Sorry, there's no way of doing so since the iphone is jailbroken.

Why would jailbreaking not allow this? If anything it would allow it. Anything you can do on a non jailbroken device can be done on a jailbroken device.