Towards the phone are sent special SMS messages (whose script has been specifically modified) that are not visible on the phone, and confirmations of receipt of that special SMS (called ping) are returning to sender containing GSM location details of the phone, respectively the BTS (base transceiver station) at which the phone is connected in the moment.

Also the location of a mobile phone via GSM operator or using special equipment to intercept / localization is done based on your phone’s IMEI and IMSI of the SIM card. Other uses: to connect and authenticate to various servers, banking operations performed on the mobile phone, various software application etc.įrom the point of view of state law enforcement and GSM operator, the IMEI serves for users filtration and selecting a specific network user, for carrying out of monitoring operations of a particular phone.

In correlation with the IMSI (unique identification code of SIM), the IMEI is necessary to any mobile phone to authenticate and connect to the GSM network.

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