Copy Music of your Iphone

iPhoneBrowser is also an option for those with jailbroken phones, providing an FTP-like interface to iPhone/touch files with a USB connection.

First thing you need to do is Jailbreak your Iphone.
You can use QuickPwn located here: http://www.quickpwn.com. Simple process.
Then download and install iPhoneBrowser. Open it and connect to your Iphone.

Transfer the files: I found my iPhone’s music nested deep inside the file structure, at /private/var/mobile/Media/iTunes_Control/Music/. You’ll probably find your music there too. Copy all the folders named F01, F02, and so on to your computer. The files have nonsensical names, but they’re really your tunes, and iTunes (and even Windows itself) knows it:

Once you’ve got your files, you can give them back sensible names in iTunes by importing them, then heading to Edit->Preferences->Advanced->”Keep iTunes Music folder organized.” Now you’ve got your iPod’s whole music library, organized, and ready to use wherever.