i am using this from one month now as request from blog readers about free call now i am sharing with all.This is really nice stuff to call free from your Yahoo Msngr To Any Mobile In world for call duration of 5 minutes.you will need yahoo account,working headset for doing this ok let' see how it works.
1)Open Yahoo messenger & Login Into your yahoo Account.
2)Now Type number toll free +18003733411 in the Box Shown Below and Press Enter.
3)Now the Connecting call to +18003733411 window will open & listen 5 sec advertisement
4)Listen the options (Last option is free call) she Says Free Calls Use Your Microphone and Say Free Calls (Don't forgot to unmute your microphone Voice in Volume Properties By Right Click on Volume Icon in your Task Bar and then click on properties and then Advanced and then unclick mute button under Microphone).
5) As you say Free Calls You will be Able To make 5 minutes free call anywhere in the World.
6)Now Click on the Dialpad (it is on right side of speaker volume)
7)Now Dial The Number In format Country code followed by friends number whom you want to call.
Example : 919823511562 where 91 is country code for India and 9823511562 is phone number.
And Enjoy Free Calling if you have any problem regarding this them leave comment.