Yeah, All of our beloved visitors,.!!
Here is the trick to call to your friend with his own number.
As a free service it have some restrictions i.e
1) Time limit only 30 second.
2) Only 3 calls.
=> Note:- only for pc users. i personally tested it on my pc.
it worked for me.
So, lets start.
1) Go to http://covertcalling.com
2) Then on the page, you'll see3 boxes where you have to fill the info..!!
3) There is captcha, too, you have enter then press reset.
Thats it.