Android Custom Dialer App - Call Merging & Conference

I want to develop an Android Dialer App We will pass 2 - 3 numbers to call into the phone through an JSON API , number1, number2 ,number3 first we need to dial number1 once its connected we need to dial number2 then number3, when number 2 and number3 are connected we need to merge all calls, we want to achieve all this without any user input / interference I am an Android developer and outsourcing this feature since its part of a project and i am not much familiar with Android Telephony & Connection classes. You should be familiar with Android Telephony, Telecom & Connection API's [login to view URL] [login to view URL] [login to view URL] [login to view URL] [login to view URL] [login to view URL] I am looking for quick turn around time (5-10 days) , those who can make it using reflection also welcome or can customise this [login to view URL]