I am very pleased to tell you that for what you have need it will definitely fulfil from here because i am expert in this field since 10+ years.
We are expert App development.
Relevant Skills and ExperieFlere
I am VOIP SIP dialer developer by profession for android and ios and window platform .
Please contact me as soon as possible. i will be so happy to work for you.
I Go through the job details carefullyFlere