I need a mobile app(s) for a2billing-based biz for both iOS and Android platforms. The app should allow calling through local numbers as well as WiFi and 3G/4G. App's design needs to be awesome. I will prefer out-of-the-box apps that have been build and tested already rather than starting from scratch. References will be required. Please bid with confidence.
31 freelancers are bidding on average $2508 for this job
Hi We are using Asterisk, opensip, Open fire , Free switch to configure back end server for VOIP. We have good experience in VOIP based app development. We had done done 5 VOIP [url removed, login to view] we are are doing 3 VOIP Daha fazlası