Please find attached file to this project.
I can pay for this project 500 USD.
And later i can give you 10+ clients ( 10 minimum ) to sell this symbian application to them on rental bases or 500 USD each copy.
rental could be 100 USD per month from each Voip Provider.
The selling and rental solution will be on 50/50% base per month.
only experience C++ / Symbian developers can bid on this project.