If you just want to give someone your Doosra number, you don’t need your app to be functioning via an active internet connection.

However you’d need an active internet connection if you want to access app features like:

  1. Enabling/disabling the call blocker

  2. Viewing messages and call logs 

  3. Accessing voicemails 

  4. Adding trusted contacts

  5. Making secure calls via Doosra