Sipnetic

Sipnetic is a free VoIP softphone based on the SIP protocol. It allows you to connect to your VoIP provider, cloud PBX, or an enterprise telephony server. ⚠️ Important note Sipnetic doesn’t offer a VoIP service. To use Sipnetic you need an account from a SIP service provider. Some features may be not supported by all SIP providers. Features: • Compatibility with all standards-compliant VoIP providers and PBXes. • Supports calling over 3G/4G and Wi-Fi. • Modern UI. • Great audio quality provided by the Wideband Opus codec. Legacy codecs, such as G.722, G.711, Speex, and GSM, are also supported. • Acoustic echo cancellation and automatic gain control. • Video calls using H.264 codec (Available as a Premium Feature). • Support for various NAT traversal techniques, including STUN, TURN, and ICE. • Instant Messaging with text and voice chat capabilities. • Secure calls based on TLS, SRTP, and ZRTP protocols. End-to-end encryption of chat messages with OTRv3 protocol. ZRTP and OTR support is available as a Premium Feature. • Integration with system contacts including built-in contact editor. • Presence information support based on the SIMPLE protocol suite. • Multiple SIP accounts support with automatic account selection. • Advanced telephony features: support for multiple calls, placing call on hold, attended transfer, sending DTMF digits, voicemail message waiting indication. • Experimental Walkie-Talkie mode well suited for low-bandwidth links. • Light and dark UI themes (Available as a Premium Feature). • No ads, no user tracking, no personal data collection. • Available in English, German, Russian, and Ukrainian. 📹 Video calls experience may vary depending on the device and firmware capabilities. Sipnetic always uses the system implementation of the H.264 codec. Android 5.0 or higher is recommended.