Ahead of the Christmas festivities, CIMG Telecom Company of the year, Airtel, has offered its subscribers a voice offer that enables customers to make Airtel to Airtel calls for free from 5am to 5pm every day. Airtel customers can enjoy the �Talk Chaw� through a one-time subscription by dialing *525# and selecting subscribe from the display menu. To enjoy the all-day free talk, all a customer has to do is to achieve his daily target by making calls and using SMS.