BootSound makes any iPhone play a custom sound on boot - iDisqus
Jailbreak 4.3.4 iOS iPhone 4, iPod touch PwnageTool 4.3.4 [How To Tutorial] | Redmond Pie
Tweak] BootS (sound like macOS) - General Cydia - iOSGods
iSounds: Add Custom Sound Effects To iOS Actions [Cydia Tweak]
BootSound makes any jailbroken iPhone play a custom sound on boot
Uninstall Appsync without losing Yalu Jailbreak [Bootloop Fix]
This Tweak Puts Your iPhone in Hibernation Mode to Save Tons of Battery « iOS & iPhone :: Gadget Hacks
BootSound - Cydia Tweak - OSX Boot Geräusch bei iPhone & Co beim Einschalten - YouTube
Add Sound Effects to Your iPhone With iSounds | The iPhone FAQ
How to add Startup Sound to your iPhone
How to Add a Startup Sound to the iPhone | The iPhone FAQ
Request] a tweak to bring separate app sound to iphone which allows you to play tow apps sounds separately (for example you can play TikTok through the speaker and music through Bluetooth) :
iStartupSound Allows You To Change The Boot Sound Of iPhone [Jailbreak Tweak] | Redmond Pie