Airtel subscribers at Kochi in Kerala are receiving messages from the operator stating a chance to upgrade their mobile connections to 4G SIM for free of charge. The message sounds like a sign that the operator has launched 4G within the space. airtel-4G-sim-kerala To add thereto, no documents square measure needed to be submitted for this upgrading. Also, the subscribers will get the SIM card delivered to their homes, if sent letter of invitation via message. the info plans and balances are carried forward to the new association. Earlier in Gregorian calendar month 2012, Airtel had launched India’s 1st 4G services in urban center. Airtel’s 4G services square measure currently out there across Asian nation together with recently launched Ambala (City and Cantt.),Karnal, Yamunanagar, Hisar, Rohtak, Nasik, Nagpur, Aurangabad, Mangaluru, Bengaluru, Pune, Chandigarh, Mohali, Panchkula, Ludhiana, Jalandhar, Amritsar, Hoshiarpur, Phagwara, Kapurthala, Moga, Bathinda and Patiala. Further, 4G trials are launched for existing Airtel customers in Delhi, Hyderabad, Vizag, Madhurai, Chennai, Coimbatore and Mumbai.