We just need an app that will run in the background, intercept calls from the native dailer and redirect those calls over a VoIP connection using SIP.
For IOS and Android
ONLY BID IF YOU HAVE DONE A VOIP APP AND SHOW ME SAMPLE WORK.
26 freelancers are bidding on average $837 for this job
Hi I work towards providing reliable, relevant and robust IT solutions at most competitive prices to my customers. I ensure 100% customer satisfaction so lets start Thanks