To become a Flipkart Plus member, the key requirement is to complete successful transactions on Flipkart within the last 365 days. Specifically:

• You need to complete at least 4 successful transactions in the past year to become eligible for the basic Flipkart Plus membership.
• For an upgraded Flipkart Plus Premium membership, you need 8 successful transactions in the past year.
• Once you qualify by completing the required number of transactions, you are automatically enrolled into the Flipkart Plus program.
• There is no charge or subscription fee to become a Flipkart Plus member; it is a free membership earned by your shopping activity.

Benefits of being a Flipkart Plus member include early access to sales, free delivery on F-Assured products, earning SuperCoins on purchases, and priority customer support.

In summary:

• Shop and complete 4 successful orders within the last 365 days to become a Flipkart Plus member.
• No payment is required for Flipkart Plus membership, it is earned through shopping.
• Benefits include exclusive deals, free delivery, and reward points (SuperCoins).

This information covers how to become a member and the main related features of the program.