1. ANDROID: These steps below will help your using experiences be more fluently, especially when you get troubles with Receiving Calls.
    • Open “Settings” at the three dots on top-right of the screen.
    • [Incoming Calls] → [Push notifications]
    • [Preferences] → [Call forwarding] → [Enabled]
    • [Other] → [Start application after boot] → [Use proximity sensor]
    • [Controls] → [Show GMS button] → Turn GREY (disable)
  2. iOS: These steps below will help your using experiences be more fluently, especially when you get troubles with Receiving Calls on iOS devices.
    • Open "Settings" at the symbol on top-right of the screen.
    • [Incoming Calls] → [Push notifications]
    • [Preferences] → [Controls] → [Show GMS button] → Turn GREY (disable).
    • [Preferences] → [3G/Wifi selection] → [Prefer Wifi].