Mobile Flex Air Application for Andriod / IPhone and Desktop Air

Hello , We currently have flex /flash web application for VOIP using RMTP flash server to SIP designed in flex 3.0. We would like to convert it to Mobile application for Andriod and Iphone and others if possible, and desktop air. We want to add following features: - integration with contacts on phone - sign up feature - access to rates - chat via openfire xmpp - sms via post via api Design and logic skills required. We looking for somebody with lots of experience with voip and mobile applications. Thanks, Oliver