Bharti Airtel, country's largest telecom operator, today announced the acquisition of 20 MHz spectrum in 8 circles from Aircel for Rs 3,500 crore. Bharti will acquire spectrum or radiowaves in 2,300 MHz band in Tamil Nadu, Bihar, West Bengal, Jammu and Kashmir, Assam, North East, Andhra Pradesh and Odisha, the company said in a statement. Aircel had won the spectrum in a government auction and is entitled to hold it till September 20, 2030. "The transfer of right to use for the circles of Andhra Pradesh and Odisha is subject to the revision of spectrum caps with the upcoming auction to be conducted by DoT," it added. With the acquisition, Bharti Airtel will become a pan India 4G operator.