NEW DELHI: The Supreme Court on Monday directed Prime Minister Narendra Modi-led central government to register details of identity of every mobile user within a year.The apex court said that there are over 100 crore mobile subscribers while making it mandatory for all mobile subscribers, including those having pre-paid SIM cards, to have their phone number linked to Aadhaar without fail within one year.The court also directed the Centre to device a way so that each person with a pre-paid sim would have to fill and deposit a form whenever he or she recharges.