Need to create a SIP app that can install on Android.
Register to SIP server
Receive call from SIP server and initiate call via telephone sim card
Connect audio from telephone call to SIP call
24 freelancers are bidding on average $538 for this job
Hi, How are you? I am a senior mobile developer with 4 years. I have a knowledge SIP server and have ever developed app calling using SIP server. Please ping me and discuss more via chat Best regards Peng