I have a SIP account which I entered into the "Internet Call Settings" of the native android phone app. I am able to place outgoing SIP calls, but no luck with the incoming ones. I am new to the SIP subject, so I was wondering what I am missing and a description how incoming SIP works would be a plus!

Info:

• Phone: Nexus 4
• OS: Android 4.3
• SIP Provider: didlogic (sip.didlogic.net)
• Google voice account: available

Feel free to ask for more info. I want to figure this thing out.