By Digium, Inc.
Open iTunes to buy and download apps.
A softphone app for use with Switchvox, Digium's award-winning IP PBX. Switchvox SMB version 6.3 or later is required. Please see the Switchvox Softphone Support link for how to set up and manage Switchvox to allow phone extensions to use the Switchvox Softphone.
What's New in Version 3.0.4
* Fixed a rare crash when originating a call on certain networks.
Fails on t-mobile LTE
Just does not work and fails to establish media stream connections specifically on t-mobile ever since firmware 27.1. I believe this partly a carrier issue but order VoIP apps seem to have found a workaround so they need to notify t-mobile as well as find a fix.