Features of Basic4Android
Features
Android 2.3.x, 4.x, 5,6
Support of SIP and RTP
UDP/TCP support
secure connection via SRTP
STUN
SIP Registrar (SIP server) support
Audio and video calls
DTMF
Status messages
User Agent name support
SIP port change
Available SIP port check
Bluetooth support
Different networks support (WiFi, GPRS, 3G, EDGE, LTE)
Registration proxy support
Log support
End User Features
Set a custom ringtone
Use softphone without registration (useful for calls in local network)
Communicate via IM chat
Play File to conversation
Put a call on Hold
Record a Call
Enable/disable Video, Microphone and Speaker during the call
Basic4Android (currently known as B4A, https://www.b4x.com/b4a.html) is a rapid application development tool for native Android applications. B4A is similar to Visual Basic and Visual Basic.Net though it is adapted to the native Android environment.