Hi Dev,
If you have same content on several pages - yes it's duplicate.
For example: abcd.com/htcmobile.aspx and below of all products are other sub categories (samsuing, nokia etc) with all products, description etc. - it's duplicate because on the other pages you will have same content but in different order.
If you are are talking about links to other categories below all products on abcd.com/htcmobile.aspx for example, it's just links (like navigation to other subcategories) so this is not duplicate.
Regards,