Reliance Jio is offering a whole bunch of free data to Xiaomi customers. People buying select device will be eligible to 30GB free 4GB data. The way this works is that customers of Xiaomi devices will need to have a Reliance Jio SIM activated on or after June 16, 2017. After that, for every prepaid recharge of INR 309 or above will get 5GB additional data (on top of whatever the recharge normally entails). This can be done for six recharges, totalling 30GB, till March 31, 2018. The list of eligible devices for this include Redmi 2, Redmi 2 Prime, Redmi Note 4G, Redmi Note 4G...
Source: http://www.gsmarena.com/reliance_jio_offers_up_to_30gb_4g_data_on_select_xiaomi_phones-news-25908.php