Gooday MIT App inventor team.
I am looking for a SIP extension to use in my app.
SIP - Session Initiation Protocol
This is an IP based dialer application that allows you to set up a user to a SIP platform, and then make use of the data connection on your mobile to make phone calls.
Looks like it can be done:
but from a quick search, it appears that no-one has yet developed an extension to handle SIP from within AI2.
An offer of sponsorship in the Work for Hire category, may bring forth a willing extension developer...
PM me the required features and your budget, if you wish to sponsor the extension.