Be careful with refurbished products. This online store is selling them, with a small fine-print written somewhere.
e.g. 6 Months Seller warranty, These phones are imported and for any warranty issues need to contact Vendor. HTC service center will not entertain warranty against this product.
Hope it is clear. No warranty from manufacturer. These items are brought illegally through un-authorized sources. Who will search for a vendor in entire Delhi area?