Android Sip Client
From VoIP.ms Wiki
This is a guide for the native Android SIP Client that is included with Android 4.1.1. We cannot guarantee 100% compatibility with all future Android releases since settings may change. We recommend the use of a wifi connection with these features, instead of a 3G connection. You also could be billed for your data usage if used over 3G/EDGE.
Step 1
Launching the Android SIP Client
To open the Android SIP Client begin by tapping on the Phone icon in your app drawer.
Step 2
Navigate to the SIP account details screen
Bring up the Settings menu by tapping on the three dots.

