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We're an Australian based company looking for a freelancer to develop an iPhone SIP Client app. The app would need to include the following features:
* Register with a SIP server (either 3g or wifi)
* Allow for upto 3 concurrent lines
* Dial and Receive calls via SIP
* Ability to conference upto 4 parties
* Call transfer
* Traverses NAT'ing networks / firewalls
* Connects to iPhone contacts
* Ability to add an out-bound prefix for stored contacts
The successful freelancer will need to demonstrate previously worked on projects with similar features. Also to assist with the publishing of the app to the app store.