Airtel vs. Jio — What's the Difference?

(historical) A form of communication formerly used within the FBI, indicating a letter that had to be typed and mailed on the same day.

Reliance Jio Infocomm Limited, doing business as Jio, is an Indian telecommunications company and a subsidiary of Jio Platforms, headquartered in Navi Mumbai, Maharashtra, India. It operates a national LTE network with coverage across all 22 telecom circles.