The SIM-HA card is the most simple and economical solution for making and receiving cell phone calls while traveling. ALL incoming calls, regardless of their origin, are always, absolutely FREE! (Except in USA). Outgoing local calls cost according to the local rates. Outgoing international calls go through ATS “Return Call Service” at very low cost.

To enjoy the service purchase from ATS a SIM-HA card of the country you are planning to visit before traveling there.
Upon arriving into the country of your destination, you already have a SIM card associated with the local operator, insert it into your phone, and you will immediately be connected to the existing network which provides you with the high quality of telephone service. 
Use your cell phone abroad as you do at home without worrying about roaming and all incoming calls are free (except in USA)

To use the SIM-HA card you will need an International GSM cell phone. A GSM cell phone is a cell phone that operates on the GSM 900 and GSM 1800 frequency in Europe and GSM 1900 frequency in USA. This international cell phone with the appropriate SIM-HA card, will provide coverage in Europe, Asia, Africa, Australia. A world cell phone with the GSM 1900 frequency will expand coverage to include the United States, Canada and a growing part of South America.

Continue to learn more about the availability of the service according to countries: