The International Mobile Equipment Identity or IMEI is a number unique to every GSM and WCDMA mobile phone as well as some satellite phones. It is usually found printed on the phone underneath the battery. It can be found by typing *#06# on a handset.
The IMEI number is used by the GSM network to identify valid devices and therefore can be used to stop a stolen phone from accessing the network.
If a mobile phone is stolen, the owner can call his or her network provider and instruct them to "ban" the phone using its IMEI number. This renders the phone useless, whether or not the phone's SIM is changed.
Cyber crime experts explains that, Chinese phones comes without Bill and Warranty, and are pirated, without being equipped with IMEI number, which are helpful for tracing mobiles. As these phones are not equipped with IMEI number, they can easily be used by anti-social elements, proving dangerous to the Nation’s security.
To, those who already have a Chinese handset, do not panic, just wait till any such official notification is out by TRAI or DoT.