This application was developed by Oomsys technologies. Avastel is a new communication app that uses your 2G, 3G, 4G or Wi-Fi (when available) to make free calls
over VoIP. Avastel is available for many smartphones and platforms.
Avastel is compatible with and optimized for Android tablets! Use Avastel on your tablet and phone simultaneously.
it's fast, reliable, private, smartphone calling app.