Friends this was purchased from a seller named TRICK SALES from USA through PayPal.
The imported model A1784 & A1661 of iPhone 7 Plus is covered under warranty in India. You should also confirm the same from Apple Care India.
Friends please dont hide out the real purchase value from the customs department when they ask you. They will ask you to submit the purchase invoice along with the bank statement which indicates the purchase. Your customs will only be cleared then.