JAHJAH uses a unique method of initiating the call. You go to a website, enter in your phone number and the number you wish to dial and JAHJAH dials both legs of the call and connects the two. I believe once you register on their site, it remembers your phone number, so you may not have to enter your phone number unless you are on the road or at a different phone, but I will have to test JAHJAH myself to confirm.
The JAJAH Free Global Calling Plan applies to land line and mobile calls to and within: the United States; Canada; China; Hong Kong, Singapore and Taiwan. The plan also applies to landline calls to and within: Australia; UK; Germany; France, Italy and most other European nations.
There is a slight catch though. JAJAH’s Free Global Calling Plan applies only when both call participants are registered JAJAH users. But hey, if you can make free calls to friends, family, etc. why not have them register? In countries where free phone calls are not available, or if someone is calling a non-JAJAH member, calls are then subject to JAJAH’s rates, usually less than 3 cents a minute. Registration is free, and no pre-payment is required.
I found this tidbit from JAHJAH quite interesting where they are relying on user's "honesty" to not abuse their free phone service:
In place of complicated user agreements, JAJAH has created a system that depends on the JAJAH community adhering to a “fair use” policy, which simply asks people to try to keep their calls within a reasonable amount of minutes. To this end, JAJAH will monitor the number of hours per individual user per day to assure that no single person damages the overall service.
Of course, it is obvious this is a bit of a marketing gimmick to get users to try and use their service and hope their service have some "stickiness" that keeps customers using their service. Still, free calls using your regular phone is great - assuming you have a web browser handy.
So where's the business-model you ask? Well, according to JAHJAH, they are counting on the community to use other paid services as well to help make this program work. Jajah believes they can "earn" money by providing added value services that the community finds useful and are willing to pay for. Other services like the occasional scheduled call and text messaging, for example, will help Jajah pay the bills. Although I am not sure how scheduled calls and text messaging is enough to offset the costs of free calls being terminated by JAHJAH. Perhaps they have some other paid applications they neglected to tell me about. Surprised they don't inject a 15 second audio ad before getting the call or something.