I have huge experience Call can be made through Cellular phones, landlines, or VoIP like Zoom or Zencastr. Collect data in environments with low background noise (e.g., ambiance noise from the streets, cafes, shopping malls, etc.) but the recorded speech must be intelligible to a native speaker. And our current tropics are Culture, Family, Finance, Friends, Health, Holiday and Leisure, Hospitality, Information & Technology, Insurance, Legal, Movies and TV Shows, News & Current Affairs, Retail, Sports, Study and School, Telecom, and Work.