AjwaTalk is a free Mobile VoIP dialer application developed by Voizarabia that allows users to make VoIP calls from any Android device using 3G/Edge/Wi-Fi internet connectivity. The application is specifically designed to meet the business needs of VoIP providers.

The application uses SIP protocol for signaling and supports G729, PCMU, and PCMA codecs. It can run behind NAT or private IP and has a user-friendly interface. AjwaTalk offers auto-sync of balance, real-time SIP status messages, call history, and address book integration. Additionally, it is compatible with all SIP standard switches.

One of the most notable features of AjwaTalk is its efficient implementation of jitter buffer to play voice smoothly. The application also uses silent suppression and comfort noise generation to reduce bandwidth usage, making it more efficient in making VoIP calls. Furthermore, AjwaTalk integrates with mobile phonebook and auto-detects the "+" sign when a contact is picked from the phonebook.

Overall, AjwaTalk is a reliable and efficient mobile VoIP dialer application that offers a range of useful features for VoIP providers and users alike.