Basically it’s not only Lenskart First Frame Free. It is a Category of Frames. You can Select Frame anytime from this Category. Your Frame will be Free. You need to Pay for the Lenses. This is Mandatory to Buy Lenses with Free Frame.
You can Click on the Given Linkand Select your Frames, When you will Select Power type and add the Lens Package. On the Payment, Page Amount of the Frame(Rs. 1299) will Automatically Get Deducted, you’ll only have to Pay for the Lenses.