India, June 11 -- The trade of stolen mobile phones has been badly hit after a new high-tech step by Apple. Apple has agreed to add a "kill switch" system that can make stolen phones useless. This change means that if a phone is stolen, it can be shut down and cannot be sold again.

Apple announced this update as a global change in phone settings after a campaign led by Britain's top police officer. The aim is to make stolen phones turn into "bricks" that have no value for thieves.

London has reportedly become one of the worst places for phone theft, with around 200 phones stolen every day. Police say other tech companies are now being pushed to copy Apple's system. Scotland Yard Commissioner Sir Mark Rowley has asked the Home Secretary ...