As the acronym SIM indicates, a SIM card is a subscriber identification module. It is that small plastic card with an integrated chip that you put inside your mobile phone to allow it to receive a signal. You can buy them from sim stores and through online shopping.

The SIM card contains an ICC number that makes it possible for your operator’s mobile network to identify your device as unique and start providing it with a line. In other words, it allows your telephone number to have coverage, and helps all the contracted services to work.

In all cases, the person in charge of providing you with this SIM card will be your operator. Once it is delivered to you, you will only have to worry about activating your SIM card by following the steps that the telephone company will indicate. You can also buy Zain sim card online from our website.

What is SIM card: SIM card types and features

SIM cards have evolved over the years. They have reduced their size while improving their technology and security systems. Currently, there are four types of physical SIM cards, classified based on their size. But we can also find this card in virtual format, called an eSIM card.

As a general rule, the SIM cards that we use on a daily basis have a storage capacity of between 16 and 32Kb. In this memory, apart from the user identification number, you can store the phone numbers and information of your contacts, and the SMS messages you receive.

What is SIM card: SIM card sizes

At the same time that our mobile phones have evolved, SIM cards have been reducing in size to adapt to new devices. Depending on the age of the phone, it will use one card or another. Don’t worry, they are easy to tell apart based on their size.

Standard SIM card

No device uses standard SIM cards anymore. Its size was too big, comparable to any of the cards you carry in your wallet. Also, his memory was very limited. This type of card had a maximum storage capacity of 20 contacts and 6 SMS messages.

Mini-SIM card

It is surely the model that comes to mind when we talk about this type of card, since it has been the most used. Its chip is the same size as a SIM card, while the plastic around it has been trimmed down to take up less space inside the phone. Its size is 15 x 25 millimeters.

Micro-SIM card

This model was created with the aim of improving security and expanding the memory of the cards. With a size of 12×15 millimeters, micro SIM cards make better use of the internal space of the devices.

Nano SIM card

The nano SIM card is the smallest SIM card model available. With dimensions of 12×9 millimeters, it is 30% smaller than the previous model. With its arrival, the goal was to optimize the size of the phone’s hardware without altering its external size.

How to identify the model of SIM card that my device carries

Identifying the model of SIM card that you have in your device is a fairly simple task, since practically all modern phones use the nano SIM card. This card is made up mostly of the chip, and includes a small part of plastic.

Since the SIM and the mini SIM are too big for current phones, the other option available is the micro SIM card. The plastic frame that surrounds the chip will be slightly larger than in the next model.