How to put songs on iphone 4?

I did not purchase these songs from itunes, I mostly downloaded them from youtube. How can I add them to my iphone

You can export your music in your iPhone through iTunes. First download iTunes on your computer then connect your iPhone and Add Music in library and sync your iPhone with iTunes.

1. Save the music on your computer
2. Download itunes
3. Import the songs onto itunes on the main menu.
4. Then plug the iphone into the computer
5. Sync the music on your phone

You need to install related software of iphone 4 which helps to transfer data.

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