Mostly yes, you need to exit and re-enter on OCI. But try your luck with FRRO. Hopefully they might allow you conversion without exiting.My OCI card is under process. I am planning to go to India on e -visa. If my OCI card is processed while i am in India and if ask someone to send the OCI card to India through mail., Can i stay in India for long time even after the Visa stay period expires? or do i need to exit India and enter with OCI card?