I Need an IPhone 4s app that will allow me to make calls using my local Wi-Fi network.
I often work in places such as basements, really secure rooms that don't have any cell phone reception, or places in the middle of nowhere that don't have any cell phone reception.
I'm looking for an app that will allow me to be able to make calls using my IPhone 4s AT&T Wireless phone using only a Wi-Fi internet connection.
I know that there are other options available such as the AT&T 3G microcell tower (http://www.att.com/shop/wireless/devices/3gmicrocell.jsp?locale=es_US&fbid=lYBG6UalgBA
However in this case I am looking for an IPhone 4s app that will allow me to do this since I'm not always able to travel to these different places with an AT&T 3G microcell tower. I already own one of these devices that I need to leave at home so that other people can use it while I am gone.
Please let me know exactly what IPhone 4s apps are available that will allow me to do this.