Development- Free IP Calling app to mobile and phone with custom ID feature (iOS & Android with admin portal) Basic Development Rules 1- Voip app require for caller only 2- Not required any app to receiver... (Budget: ₹14000 - ₹18000 INR, Jobs: Android, Asterisk PBX, Jitsi, Mobile App Development, Open Source, SIP, VoIP, WebRTC)