The IMEI (International Mobile Equipment Identity) is a unique 15-digit identification number assigned to every mobile phone and smartphone. It’s like the phone’s fingerprint—completely unique to each device and a key identifier for network providers.
Network providers use the IMEI to track, block, and manage phones. If a phone is reported stolen or if the owner falls behind on payments, the provider can block the phone using its IMEI. Once blocked, the phone becomes unusable on most networks. This is why the IMEI is a critical tool for tracking lost or stolen devices and preventing them from being used illegally.
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As a buyer, checking the IMEI can save you from buying a phone that might be blacklisted. Some vendors—especially second-hand shops or pawnbrokers—may not check a phone’s status, leaving you with a device that could be blocked. Knowing the IMEI before you buy allows you to check if the phone has been reported stolen or blocked due to unpaid bills. This can prevent you from wasting money on a device that’s essentially useless.