3CXPhone for Android 16.4.4 screenshot Free SIP phone to make VoIP calls via an IP PBX (3CX /Asterisk)or VoIP provider 3CXPhone for Android is a free VoIP Softphone that works with SIP based IP PBXs such as 3CX or Asterisk and popular VoIP providers. Download 3CXPhone for Android 16.4.4
