Airtel has launched its 4G LTE trials in Mumbai, few days after it started 4G trials in Chennai. This is based on 2300MHz TDD-LTE band 40. It also offers TDD-LTE services in Pune, Kolkata, Bengaluru, Chandigarh and Amritsar. For existing Airtel customers, the company is offering a complimentary upgrade to Airtel 4G at same price as 3G. Continue reading “Airtel launches 4G LTE trials in Mumbai”