I have reserved the Ola scooter but need to make changes in my booking, how should I do that?

You may change your registration details (name, address) and vehicle preference details (variant, colour) for each of your reservations via the Ola app. You cannot however, transfer a reservation from one phone number to another.
Registration details and the vehicle colour can be modified till the time of Balance Payment. The vehicle variant can only be changed before making the Advance Payment of Rs. 20,000.