Hi Mate,
Greetings of the day!!!
Thanks for detailed description about your project.
We are having core expertise in VoIP based industry since decade. We are having own products for SoftSwitch class 4/5 based on Asterisk,Sip Dailer for Android and iOS, Voice and SMS Broadcasting Solution. We are very much interested in your project because know from where to start and where to end.
We are having a team of good strength of members having sound technical knowledge and follow agile methodologies which can enhance user experience on next level.
As per our experiences, we can customize entire requirement with all mentioned features to implement.
Please return us back to discuss more to clarify if any concern we may have.
Thanks,