Most Chinese mobile phone makers use fake IMEI numbers or use the same number for a large number of mobile phones. In the event of a terrorist act or any other criminal activity the Govt. is unable to trace the accused people.
Hence it has been recommended to the Govt. that Chinese mobile phones be banned in India. Not just sale of these, but usage of these on all Indian networks also be banned. Most network operators will be banning Chinese mobile phones as soon as they get directives from the government which shouldnt be very late seeing the current security situation in the capital.
http://indiantechblog.com/2008/10/chinese-mobile-phones-to-be-banned-in-india/