>I would like to know some way s of transferring music to iPhone. Someone says to me that the recommended software to be used is iTunes. However, that one seems to charge for transferring music to iPhone. So, most of the users are using free software available that does the same. The problem is that those install spyware and some things like that which practically destroys the PC.

There is no charge to transfer music to an iPhone that I know of.

With iTunes open:
If the music is on a CD, just put the CD in the drive and iTunes will ask if you want to import the music.

If the music is in another format (such as wma or mp3), click "File" and then either "Add file to library" (for a single song) or "Add folder to library"(for multiple songs). iTunes will ask if you want to convert it and say yes.

FWIW, the new version of iTunes is finally (IMO) showing some real promise. Love the interface!