Amazon Great Indian Festival sale and Flipkart Big Billion Days sale will begin in India on October 7 and October 8 respectively. During the sale, customers will get discounts and offers on smartphones from brands like Apple, Samsung, OnePlus, Realme, Xiaomi and more. Here are the top 5G smartphones under the price of Rs 30,000 that are available on offers and discount during the Flipkart and Amazon sale