VoiPhone is an open source SIP user agent application for iPhone running on firmware 2.x. It enables voice communication and is available for free.
The main focus of voiphone is to provide iPhone users with a reliable and high-quality SIP user agent application that can be easily installed and used for making voice and video calls. The application has been specifically designed to work seamlessly with iPhone firmware 2.x, ensuring that users can enjoy a smooth and uninterrupted communication experience.
Overall, voiphone is a great option for anyone looking for a comprehensive SIP user agent application for their iPhone. With its open source license, users have the flexibility to modify and customize the application as needed, making it a powerful tool that can be tailored to individual needs.