Hey, I'm working on an Android application that needs to initiate a SIP call using 3CX for 3CX Phone Systems. However, I am unable to make the 3CX app respond to any intents I send. Code: Uri phoneCall = Uri.parse("sip:12345"); Intent caller = new Intent(Intent.ACTION_CALL, phoneCall); startActivity(caller); This snippet runs fine in my app and triggers the android dialog to pick an app with the suitable intent-filters. Any other SIP app from the Android market I've tried seems to respond fine, but 3CX does not. I have also tried the ACTION_DIAL alternative. Is there another way to call the 3CX app and initiate a call to a specified number or is this simply not supported?