Bharti Airtel is an Indian multinational telecommunications company, headquartered in New Delhi. It operates in 18 countries across the Indian subcontinent, Africa, and the Channel Islands. In India, the company provides mobile telephony services using 5G, 4G, and LTE Advanced technologies, along with fixed-line broadband and voice services, while the range of services varies by country of operation. Airtel is the second-largest mobile network operator in India and second largest mobile network operator in the world. It has also deployed Voice over LTE technology across telecom circles in India to support voice calls over 4G networks. Wikipedia