Features of the Acrobits Softphone client include push notifications on incoming calls, bluetooth headset and speaker phone support, call recorder and player, multiple SIP account support, iPhone contacts integration and a detailed call history. It is easily set up by the user and offers a logical layout. The Acrobits Softphone app can be downloaded from iTunes with WiFi and 3G network capability. It requires iPhone OS 3.0 and costs $ 6.99.
Voip for iPhone - You can download Acrobits Softphone app for Apple iPhone here