The IMEI number has many uses, but one of the most significant is the ability to block a lost or stolen phone from accessing a network. Therefore, if a device has both a SIM card slot and an eSIM, then it will have two IMEI numbers, referred to as вЂњIMEIвЂќ and вЂњIMEI2вЂќ. As it is still a type of SIM card, it requires a separate IMEI. ItвЂ™s considered the next generation of SIM card, and is becoming more and more common. This is basically a SIM card that is already installed in the device, which you canвЂ™t see, replace or remove, but can be programmed remotely to switch carriers. Some devices incorporate a relatively new technology, called an вЂњeSIMвЂќ, which is short for вЂњembedded-SIMвЂќ. Therefore, networks have access to both your customer ID (from the IMSI) and device ID (from the IMEI). This number embeds the country and carrier of the intended network, as well as identifying the specific user of that network. Each SIM card stores its own unique number in the chip, called an вЂњIMSIвЂќ number, which stands for вЂњInternational Mobile Subscriber IdentityвЂќ. The IMEI number is how networks identify your phone, but not your SIM card. A more standardised method is by dialing *#06# on your phone, which most manufacturers have built in, but you can also generally find any device identifiers from the settings app/menu. It is therefore common to find the IMEI number printed somewhere around the exterior of the device, such as inside the battery compartment, or engraved on the back of the phone or SIM card tray. The IMEI number is generated and assigned to the mobile during the manufacturing process and never changes from that point. The term вЂњIMEIвЂќ stands for вЂњInternational Mobile Equipment IdentityвЂќ, and it is a unique 15-digit number which identifies every cellular device.

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