How it works
iQall is an application allowing you to make free calls from your iPhone. iQall uses Epygi Quadro IP PBX to establish the calls between your iPhone and dialed numbers anywhere in the world. After installing iQall on your iPhone, just configure it with a Quadro IP PBX entering the IP address and the password of your Quadro as well as the phone number of your iPhone. Having done that, simply dial or select the number you want to call to and press the “Call” button. Then iQall sends via the Internet the request to the Quadro IP PBX to connect your iPhone to the dialed number. Quadro calls you back via a carrier and connects you to the dialed number.
It doesn’t matter where you are, you can call to your co-workers in the office just dialing the extension number - the same as if you are in the office and calling from your in-house extension.
Your iPhone number and the numbers you are dialing should comply with the numbering format used in the Call Routing Table of the Quadro IP PBX. iQall is not a softphone however, since it uses the Quadro IP PBX for making the call, the call connection path may include VoIP (Voice over IP) fragments.
Cost savings calling convenience
Since the Quadro IP PBX calls you back for connecting to the destination, you don’t need to pay any charges on your iPhone if you have a GSM plan with the free inbound calls. Also, since the connection to the destination is established by the Quadro, you don’t need to pay for that call leg on your iPhone even if you are making international calls.
If your iPhone is not tied with a specific carrier, you will save even more on roaming charges when traveling. Just install a SIM card from the local carrier and make calls using iQall. The Quadro located in your country will call you back via ITSP (Internet Telephony Service Provider) or any other carrier configured on your Quadro, and will connect the call. Your SIM card will not be charged at all.
In cases when the Quadro is using the carrier (cellular, local, long distance or VoIP) for connecting the call, some charges may apply to call legs which use the carrier.
For more details see at the link below: