Now there is a way to change the boot up sound as well thanks to a new jailbreak tweak.
The jailbreak tweak is aptly called BootSound, and it adds the Mac startup chime while your iPhone is booting up.
After installing the jailbreak tweak, all you need to do is respring the device, for the startup sound to be enabled.
Check the video below to see how it works:
BootSound is available for free on Cydia. If you’re wondering how the Mac startup chime was created, check out Wikipedia for the details.
Let me know how it goes in the comments.