How Do SIM Cards Work ?

SIM stands for Subscriber identity module, it is a technology which allows the mobile company to identify which Mobile Phone you're using. It is a very crucial step as SIM card acts as a secondary medium for transmission of data from the cell towers.

In this new era of technology where signals are blasted from cell towers, these signals need to know exactly where to sent the data. This is where the role of sim cards come-in , these cards although small, contain a very important 64-bit(8 bytes) number which serves as a unique identifier. Although it takes only 8 bytes , there are about 10 Quintilian of numbers that can be stored in this way, so this method should work no matter how many people sign in for Verizon or other mobile network.

When you turn on your phone with the SIM card inserted, your phone will pass your SIM card ID number along with an authentication key also found on the SIM card to your cell phone network provider, your network providers job is to then generate a random number and uses the key to form a new authentication number. The random number is then sent back to your phone.

The same method is done by your phone to generate the response number, if the two numbers match then your provider will instantly recognize and connect your phone to the mobile network. These steps although huge, is done by computers and happens within a few seconds.Also these security steps will ensure that it is your SIM card that is connected not anyone else's , as a particular SIM card can only generate a particular number.

Other than identifying information SIM cards can also store personal information and has a maximum storage capacity of 1 MB , this is pretty enough for storing about 100-250 contacts.

ALSO READ : Flash BIOS without Crashing Your PC

If you loved my post, dont forget to say thanks. Also help us improve more by posting comments, your comments help us to move forward...

Comments

Akinator The Genie: In-depth Review of a Mind Reader Game

For a while, I was searching for a good app that can read our mind. No, I am not talking about an app which simply tells what we are thinking, but this app asks us to imagine a person (Real or fictional) and asks us some questions about the person. We should answer them correctly, and within 20 questions it will guess the person correctly. I am talking about ' Akinator The Genie ' from the company Elokence . We can say that this game is a success by looking at its downloads. It has over 50 million downloads and a rating of 4.3/5 . Akinator the Genie Many have tried to understand the algorithm of Akinator the Genie because it's algorithm is one of a kind, and that makes it magical. Rhett Allain of Wired has come up with a theory of how the game works, you can check out the article here . I have personally used this app a number of times, and every single time it gives me the correct answer. I was surprised when it gave me the right answers even when I t

Top 5 Cool Tech Under ₹250 (2017)

We all do online shopping from sites like Amazon, Flipkart, eBay etc, In my case, I use it mostly to buy tech gadgets. There is some cool tech that is available under ₹250. So what are we waiting for, lets dive in! 1. HP X1000 Wired Mouse - ₹199(Amazon) The first thing on our list is the HP X1000 Wired Mouse. This wired mouse is pretty lightweight weighing at just 91 grams. It looks fantastic with a glossy black top along with the metallic gray shine. It has an optical sensor and three buttons, also you get a scroll wheel. The mouse is fairly compact and really easy to use. It's fairly economical for the price that it's available at and it works well. So If you want an additional mouse that you can just throw in your bag and take with you, this one will definitely come in handy. 2. Photron Selfie Flash - ₹219(Amazon) If you are into selfies, this Photron FL100 Portable 16 LED Selfie Flash will come in handy. It has an inbuilt battery which charges for a

10+ Run Commands Every Windows User Should Know

Microsoft Windows is the first preference of every regular PC user, as its easy to operate and it implements lots of features in it. Well, Run commands are one of the best useful tools you can think about. Run commands are the best way to quickly access any app or task in Windows. By the way, most power Windows users use Run commands to open simple apps like notepad to the advanced apps like Group Policy editor. Note: press “Win + R” on your keyboard to open the Run dialog box, and enter any of the below commands to access the respective tool. So, in this article, I am going to share 10+ most useful Run commands every Windows user should know. 1. calc You guessed it right, the " calc" run command opens up the calculator app. Just enter " calc " in the run dialog box, and immediately calculator will open up. calc 2.control The control panel is used for managing all the system settings and programs, and we need to access it from time to time

TECHNOLOGY GIANTS

Search This Blog