How to use music as ringtone in iphone

Iphone has many special features.I would to say about ringtone making in an Iphone.
Iphone has got an special feature of making an ringtone.we can potentially make a ringtone from an song
It's fairly Simple . Itunes can do the process but it takes some cost.but by the following process we can make a ringtone without any charge.

Step 1:

• Open Itunes and select the song you want to edit.
• Right click on the song selected and click 'Get Info' when the menu appears.

                        

Step 2:

• Click on the tab that says 'options'
• Select the 'start time' and 'stop time' that you want to edit.
• The song edited must not exceed 30 seconds.how ever it may be less.

Step 3:

• Now return to the library of Itunes where the music file is.
• Right click on the file and choose 'Convert Selection to AAC'.
• The new file will be created with length of 30 seconds.

                                              
Step 4:

• Now drag the created file to the desktop.
• And return to the Itunes and 'delete' the created file.
• This will not effect the original file as well as the desktop file.

                                

Step 5:

• Now choose the file you have moved to the desktop and right click on it.
• A menu appears on screen.Choose the option 'rename' and edit the name.
• The name renamed will be end with a domain ".m4r."

                      

Step 6:

• Now drag the file from desktop back to Itunes.
• Now you can connect your phone through USB port .
• When the option 'SYNC' appears click 'OK'.
• That's it the file will be transferred to the device.
• Now you can enjoy your song as your ringtone on your device. 

That,s it.This process can be done as many as you would like to edit