If you have a double SIM phone, two IMEI numbers are displayed, one for each SIM slot The device compatibility tester at the top of the page checks whether it can be determined whether it is blocked or unlocked. In most cases we can determine the status of a phone, but we cannot guarantee that we have information for each device. If we cannot determine whether your device is locked or unlocked, you may need to contact the previous operator. If you register your phone or try to sell an old one online, you may be asked for your IMEI number.
The service provider can use the IMEI number to blacklist stolen devices. If a user reports that a phone has been stolen, the service provider can blacklist the number and lock the phone from its network. The UK has a voluntary charter operated by mobile networks that helps to get an operator’s blacklist of phones to CEIR and then to all other networks within 48 hours. This way you can scan the lists to see if there are any discrepancies that require further investigation.
This is also a powerful tool because the first date of using this phone can indicate the phone’s warranty date and when the phone is no longer guaranteed. These numbers are very important for mobile phones and the mobile phone industry. AT&T and T-Mobile are mobile operators who use GSM technology to provide their customers with a wireless service. Think of the IMEI number or MEID number as the social security number of the phone.
Thefts reported before November 2012 have not been added to the database. CTIA refers users to websites in and to GSMA where consumers can check whether a smartphone has been reported to its member operators as lost or stolen. The relationship between the former and a list of national or international IMEI blocks is unclear.