Cross-Platform VoIP Mobile App

I’m ready to turn my concept for a phone-based VoIP solution into a full-fledged mobile application that works seamlessly on both iOS and Android. The app must deliver crystal-clear voice calls, reliable video calls, and real-time messaging inside one clean, modern interface... (Budget: ₹12500 - ₹37500 INR, Jobs: Android, App Store Optimization, iOS Development, iPhone, Mobile App Development, SIP, VoIP, WebRTC)