Bharti Airtel will commercially launch the 3G (third-generation) services in Chhattisgarh and Madhya Pradesh by January next year. The service will be launched in both the states, which comes under the Madhya Pradesh-Chhattisgarh circle of the Bharti Airtel simultaneously. This would be the New Year gift for the Airtel subscribers in both the states, a company official said. The official said that priority of the company was to launch the service first in the metro and big cities.