Bharti Airtel Limited, commonly known as Airtel, is an Indian multinational telecommunications services company based in New Delhi. It operates in 18 countries across South Asia and Africa, as well as the Channel Islands. Currently, Airtel provides 5G, 4G and LTE Advanced services throughout India. Currently offered services include fixed-line broadband, and voice services depending upon the country of operation. Airtel had also rolled out its Voice over LTE (VoLTE) technology across all Indian telecom circles. It is the second largest mobile network operator in India and the second largest mobile network operator in the world. Airtel was named India's 2nd most valuable brand in the first ever Brandz ranking by Millward Brown and WPP plc.

LTE Advanced is a mobile communication standard and a major enhancement of the Long Term Evolution (LTE) standard. It was formally submitted as a candidate 4G to ITU-T in late 2009 as meeting the requirements of the IMT-Advanced standard, and was standardized by the 3rd Generation Partnership Project (3GPP) in March 2011 as 3GPP Release 10.