I am using an Apple Iphone 4 which runs on OS 4.2.1. Since last night I was trying to download ringtones but cannot get through it. I had even gone to the store, to purchase some ringtones. I got it in the music library on my machine, could not find the ringtone selection option on my Apple Iphone. In the ITunes application on my PC could not figure out the tab for ringtones, so I need some assistance and your opinions about this are welcome.