Jajah :

This service is surprising in its simplicity: Jajah intends to make calls at low cost via the Internet without headphones, or microphone, or downloading software: just go to the site, type its number in a box, then that one you wish to call in another. Moments later, the phone rings at both places. We did not need a helmet(combined use of traditional).

Calls between Jajah users are free to the following conditions:

- You and your friends should use mobile phones or fixed in zone 1 (USA, Canada, China, Singapore, Hong Kong, Taiwan) or a fixed phone in Zone 2 (mainly Europe).
- The telephone number of your friend must be registered with Jajah.com as one of its source numbers.
- On behalf of your friend must be "active" (an account becomes inactive after two weeks of inactivity if no toll-free, cheap calls or SMS has been made)
- You have not exceeded the fair use policy: 1000 minutes per month, five hours per week, 1 hour per day.
- Apart from these conditions, tariffs are rather attractive, but remain in the standard telephony market, whether online or traditional.

Apart from these conditions, tariffs are rather attractive, but remain in the standard telephony market, whether online or traditional.