Here are four of the most common ways to upload music on your cell phone, you scurry over to your computer to transfer the music via USB, though V CAST phones for that matter, you can easily download music.
To download the music from computer to cell phone is very easy, connect your cell phone to the computer via usb, and then transfer musics to it, that's OK. But think you're wanting to download the iTunes music from computer to your cell Phone, right, well, as answered above, get the musics that you download in iTunes on your computer, maybe you'll need to convert the musics with aneesoft video converter to your cell phone's supported formats, then connect you phone and sync~