Yes, what you have read is absolutely TRUE!

18003733411 Provides you free international calling. For India, the call time limit is 5 mins. But you can call again and again to that IVRS for making free calls. To use this service freely without any local charges, you need Skype or Yahoo.

For Skype :

Choose your caling country as US, this can be done by selecting US flag in Dial pad interface. Then call to 18003733411

For Yahoo :

In the contacts search box enter +118003733411, then select call option.

Making Free Call By Any Of The Above Two

• By using any of the above, do the call. It is an IVRS, follow that.
• You have to say FREE CALL, then an advertisement will come, during that dont click anything,instead wait for the IVRS to ask you to enter the phone number to which you would like to make the call.
• Now, by using dial pad key in the phone number. Thats it, you will be directed to the phone number which you have entered.

Cons: As it is a free service many users try this. So during some times it says the server is busy.