What Is Difference Between IMSI And TMSI

IMEI, TMSI, and IMSI all contain numbers, but they’re actually different from each other. You need to know what is difference between IMSI and TMSI is and what makes them different. TMSI, IMSI, and IMEI are all associated with the mobile subscriber in the GSM network.

Below, you are about to find details about IMSI, TMSI, and IMEI, including the differences between them all. Each code contains different numbers and different meanings. They also have different functions. Take a look at all details about each code.

What Is Difference Between IMSI And TMSI

Each mobile device has its own identification number that makes it different from any other mobile device. What is the identification number of your mobile phone and what does it mean? The details are all available below.

TMSI

A Temporary Mobile Subscriber Identity is assigned by the VLR entity. It assigned TMSI after GSM networks like BTS or base station and GSM mobile station both establish communication. The network will then use TMSI during call management tasks and call processing instead of using IMSI.

The length of the TMSI is shorter than the length of the IMSI number. That’s one difference between IMSI and TMSI. Because of the shorter length of TMSI, it becomes more efficient for the transmitting process. TMSI is used to replace the IMSI.

The goal is to provide security to all mobile subscribers because there is no need to transmit IMSI continuously.

IMSI

The International Mobile Subscriber Identity number is assigned by the telecom carrier or telecom service provider to the mobile user. What is difference between IMSI and TMSI? IMSI is longer than TMSI and IMSI number is stored on the SIM card.

IMSI number contains 15 digits of the number that calculate specific country codes so that you can use international subscriber service. The IMSI is used for acquiring specific details in the visitor location register or home location register. The first 3 digits of the IMSI number are the mobile country code.

And then the rest of the 15 digits is the mobile network code. To prevent identity eavesdroppers and to track the radio interface subscriber, the IMSI is rarely sent. This is another difference between TMSI vs IMSI.

IMEI

International Mobile Equipment Identity or IMEI is the most famous number that is usually unique. IMEI is going to identify iDEN, WCDMA, and GSM mobile phones. Usually, the IMEI number is printed in the phone’s battery compartment or added to the back case of a phone.

You can also see an IMEI number on the screen of your phone by typing *#06# on the keypad of your phone. If someone stole your phone, you can stop the thief from accessing the network in your country, simply by using the stolen phone’s IMEI number.

As a subscriber, you will be identified by your IMSI which that is stored on your SIM card and then transferred to another handset.

What Is Difference Between IMSI And TMSI in Terms of Function

TMSI, IMSI, and IMEI all have different roles. You need to understand not only the difference between TMSI and IMSI but also the role or importance of each number. Below are the different roles or functions of TMSI and IMSI.

TMSI

The main function of TMSI is to replace IMSI and to make sure that the mobile subscriber’s privacy is secured. TMSI is going to prohibit the tracing of the mobile subscriber’s identity. This temporary mobile subscriber identity is going to intercept the radio link’s traffic.

The authentication center or AUC is the one that assigned TMSI to any mobile subscriber. This number will be assigned when the subscriber is in the MSC service area.

IMSI

IMSI is going to help you prevent fraud. One unique technique fraudster uses to take over your mobile identity to steal assets and cash is SIM swapping. SIM swap checks will be used to prevent this harmful activity. A silent process is going to look up the IMSI number that connects to the SIM card.

Now that you know what is difference between IMSI and TMSI, it is time to know about a unique device that can send messages to all mobile devices near you. The unique device is called Hitech Terminal Enterprise and you can get it only from the official website of SMS Broadcaster.