20 20 Voip is a mobile VoIP dialer application that allows users to make VoIP calls from any Android device. With support for 3G/Edge/Wi-Fi internet connectivity, this app is designed to meet the needs of VoIP providers and businesses.

Using the SIP protocol for signaling, 20 20 Voip offers a user-friendly interface and supports the G729 codec. It can run behind NAT or private IP, ensuring seamless connectivity. The app also features auto sync of balance, providing real-time updates on account balance.

With its call history feature, users can easily track their call records. The address book integration simplifies dialing by automatically detecting the "+" sign when a contact is picked from the phonebook. Compatibility with all SIP standard switches ensures smooth communication.

To enhance call quality, 20 20 Voip implements an efficient jitter buffer for seamless voice playback. It also utilizes silent suppression and comfort noise generation to reduce bandwidth usage, making it an efficient choice for VoIP calls.

Overall, 20 20 Voip is a reliable and feature-rich mobile VoIP dialer application for Android devices. It offers a seamless calling experience with its user-friendly interface and efficient call handling capabilities.