More than one and a half billion mobile phones were sold in 2007, a 16% increase from 2006. Millions of cell phones are lost or stolen each year. One way to deactivate the lost or stolen phone is by utilizing the International Mobile Equipment Identity (IMEI) code. Cell phones that participate in this program can easily block or blacklist the device. While the system is not 100% effective, it is believed to be a deterrent to cell phone theft.
Identification
An IMEI code is a unique number assigned to mobile and satellite phones, including every Global System Mobile (GSM), Integrated Digital Enhanced Network (iDEN), and Universal Mobile Telecommunications System (UMTS). The number is typically printed on the phone, beneath the battery.
Features
An IMEI code is a 15 or 17 digit number that is stored in the phone, not on its SIM card. The number is not assigned to the owner of the phone, but to the actual piece of equipment. It stays with the phone even if the phone changes owners. One way to find the phone's IMEI is to dial the following set of characters on the handset: *#06# .
Function
The function of an IMEI code is to identify the phone. When a phone is turned on, its unique IMEI number is transmitted and verified by the appropriate network. The information it receives will determine if the phone will be able to log into its network, thus allowing it to receive and make calls. It is possible to override the system by special tools and hacking. It is estimated that 10 percent of IMEI's are not unique numbers and may have been improperly reprogrammed.
Function
The IMEI is a beneficial tool in preventing stolen cell phones from connecting to a network and making calls. Once a phone owner contacts his network and reports a stolen phone, the phone can be quickly disabled via its unique IMEI. When a phone is reported stolen using the IMEI, it is referred to as "blacklisting" that particular device. Blacklisting is seen as a deterrent to crime.
Significance
The IMEI's current sequence of digits are as follows: AA-BBBBBB-CCCCCC-D. The first two digits or "AA" represent the reporting body identifier which indicates the GSMA approved group that allocated the type allocation code. The type allocation code identifies a particular model of wireless phone. The "Bs" are digits that represent the remainder of the type allocation code. The "Cs" represents the serial sequence of the model. The "D" or final digit in the IMEI is an algorithm that validates the identification number.
Tags: IMEI code, allocation code, type allocation, type allocation code, cell phones