Usage Note
Telefonia is a feminine noun covering the industry and technology of telephone communications. It is commonly used in compound forms: telefonia mobile (mobile telephony/cell phone industry), telefonia fissa (landline telephony). As a sector name it is often used without an article: lavorare in telefonia (to work in telecoms).
Examples
"Lavora nel settore della telefonia mobile."
Natural Translation
She works in the mobile phone industry.

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