Airtel has partnered with Flipkart to sell the service bundled with the devices of brands like Xiaomi, Motorola, Lenovo, Asus and Huawei, online. Other than Flipkart for online sales, Airtel has also inked a deal with Samsung to distribute 4G. Under the partnership with the South Korean handset maker, both the companies will promote each others’ 4G offerings at their respective outlets. “We want our existing customers to be the first ones to enjoy the Airtel 4G experience and are offering them a free upgrade to Airtel 4G at the same price as 3G,” Gujarat Ashok Ganapathy Bharti Airtel CEO for Mumbai, Maharashtra and Goa said in a statement. Ganapathy says that they will use the information gathered during the trial period to gauge the customer feedback regarding quality of their 4G service.