Bharti Airtel has introduced 4G trials for its subscribers in Warangal in Telangana.

As part of the trial offer, Airtel customers in Warangal can avail a complimentary upgrade to Airtel 4G at 3G prices. Further, in a bid to promote 4G, Airtel has go-to-market partnerships with device maker Samsung and e-commerce player Flipkart.

Airtel now offers 4G in more than 44 cities in India. The operator first launched its 4G services in Kolkata in April 2012.