Manage your iPhone without iTunes, backup your iPhone files to your computer or new iTunes.
"I have got some music onto my iPhone 3GS from my friends, and now want to copy them to iTunes or computer to enrich my iTunes library. The problem is how I can transfer music from iPhone to iTunes. Can I sync my iPhone with iTunes directly? Any ideas?"
In this case, you can't sync your iPhone 3GS to iTunes directly. If you do that, you will lose this music because iTunes may delete the files on your iPhone, not in iTunes library. Therefore, you should ask the third party for help. Besides music, for other files on your iPhone to iTunes or computer transfer, this iPhone to computer transfer is very necessary as well.
When you install a new iTunes on computer and want to "pair" your iPod with your new library, this kinds of software also your best choice.
All-in-one iPhone transfer: Transfer music, video, photos between iPhone and computer, iPhone and iTunes, iPhone and iPhone or iPod. Detail information about how to sync picture from iPhone to computer that is very helpful for people who like taking photos with their iPhone.
Instead of iTunes to sync files to iPhone: It can help you copy or sync files to iPhone or iPod directly no matter iTunes install or not. And this iPhone to computer transfer allows you to copy all files or only selected files.
Manage your iPhone like USB storage device: You connect your iPhone to new computer, and then pass iPhone files safely and fast. It even enable you to manage several iPhone or iPods at one time.