VOIP SIP SDK for B4A allows to build a custom SIP softphone for Android 2.3.x, 4.x, 5 with support of voice and video calls (please see the screenshots in attachment).
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
• 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