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I need a basic android VoIP program which enables two users be able to speak directly by using Wi-Fi. This is for a university project, so I need to be able to tell what is happening when the program starts, until the program ends. So I want a detailed information about how the program is running, using which connection protocols etc.
The deadline for the project is 10th of May. If I can have a fast reply, we can discuss details furtherly.