VoIP SIP SDK for Android

ABTO Software VoIP SIP SDK for Android allows you to build a custom SIP softphone for Android 4.4, 5, 6, 7, 8, 9, 10, 11, 12, 13 and 14 with support of voice and video calls.

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windows-dev

Windows

macos-dev

Max OS

linux-dev

Linux

Development environments

  • Android

Features

Android 4.4, 5, 6, 7, 8, 9, 10, 11, 12, 13 and 14

Support of SIP and RTP

UDP/TCP support

MWI support

secure connection via SRTP and ZRTP

STUN and other IETF standards (compatible with SER, OpenSER and Asterisk)

ICE support

SIP Registrar (SIP server) support

Audio and video calls

Single line support

DTMF

Status messages

User Agent name support

SIP port change

Available SIP port check

Bluetooth support

Second registration

Different networks support (WiFi, GPRS, 3G, EDGE)

Registration proxy support

Log support

Available Codecs

G.711-ALaw

G.711-muLaw

G.729

G.723.1

VP.8

OPUS

Speex

Theora

GSM

H.263

H.263+

H.264

End User Features

Set a custom ringtone

Conference call

Use softphone with no registration (useful for calls in local network)

Communicate via IM chat

Check Call history

Store and use Contacts list

Play File to conversation

Put a call on Hold

Record a Call in wav or aac format

Send DTMF (useful for calls to call center)

Enable/disable Video, Microphone and Speaker during the call

Updates

An important Update VOIP SIP SDK for Android

July 30, 2025

Change log: – 16k alignment – minimum supported Android 5.0 – transition to new C++ library libc++_shared.so instead of libstlport_shared.so – use newer OpenSSL 1.1.1w – updated srtplib to 2.5.0 – android API target level set to 35 – internal engine update to target deadlocks, memory leaks and flow incinsistencies – Updated sample projects to target API level 35

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Update VOIP SIP SDK for Android

November 7, 2024

Android SDK change log: – changed username to SIP URI in receiver argument of onTextMessageReceived callback – disabled code which removes auto dial DTMF suffix – SDK target changed to API level 34 – added RX and TX byte counter to AbtoPhoneMediaQuality – added method to specify custom REGISTER headers – fixed H264 full HD (1920×1080) video capture – added POST_NOTIFICATIONS permission

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Updates of VoIP SIP SDK for Flutter

September 4, 2022

Change log: – SDK is now distributed in plugin form, which simplifies integration in 3rd party project – Native Flutter(Dart) widget for video views – IM-related functionality: method to send IM and events to receive the incoming message or delivery status of a sent message -License information support – Updated native SDK’s (iOS and Android) – Example application call UI fixes – DTMF functionality: method to send DTMF tone and event to receive tone

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