Ringtone & wallpaper are the most attractive part of your phone whenever you are with your friends and suddenly your phone rings so if your phone rang with the cool ringtone you will be the center of attraction and they will ask about cool ringtone.
There's a plenty of sites and applications to get ringtones, but far and out this easiest is Zedge. It's the program which appears to alter the cellphone but most especially using its Ringtone and Wallpaper galleries.