Why is one corner of the SIM card cut? Half of the country's population does not know the engineering behind it.

SIM Card: The SIM card is an important part of the mobile. Without it, you cannot use your phone. You may have noticed that there is a slight cut on one edge of the SIM card. Have you ever wondered why this happens? If not, then let us tell you the reason behind it.

SIM Card: We use many such things in our daily life that we do not pay attention to. Whether it is about its design or the way it is used. Often, we start using them without paying attention to all these things. Whether it is a USB port or shirt buttons, there is some special reason behind the shape and structure of every thing. One of these is the design of the SIM card installed in our mobile phone.

We have been looking for years what a SIM card is, how it works etc. but we never paid attention to its design that why there is a slight cut on one edge of it. Have you ever wondered why the design of the SIM card was kept like this? Let us tell you that its design is not just for show, but there is a special engineering thinking hidden behind it. Let us tell you today what is the reason behind this small cut.

There was no such design earlier

The SIM card we use today has one edge cut. Let us tell you that such a design was not always there. In the early days of mobile phones, SIM cards used to come in a very simple and completely square shape. At that time, most people had difficulty understanding in which direction to insert the SIM in the mobile.

Many times people tried to insert the SIM in the upside down or wrong direction, due to which there was a risk of the SIM card chip or the SIM slot of the mobile getting damaged. Seeing this problem of the users, telecom companies and mobile companies decided to change the design of the SIM card so that it becomes easier to insert the SIM in the mobile correctly.

What is the 'Poka-Yoke' design concept

The reason behind cutting one corner of the SIM card is also the 'Poka-Yoke' design concept. This is a Japanese word. It means 'not to make a mistake even by mistake'. The purpose of cutting the corner of the SIM card is to give it such a shape that it can be inserted in the phone only in the right direction. A similar cut is made in the SIM tray of the mobile phone so that you do not make a mistake while inserting the SIM card. This small but effective design has made the use of mobile SIM card easy and convenient.

The design of the SIM card kept changing with time

With time, as technology progressed, mobile phones became thinner and compact. Due to this, the size of the SIM card also kept changing but one thing always remained the same in every SIM and that is the cut given on one of its corners.

Mini SIM: This SIM, which was in use for a long time, was of normal size and fit in the mobile.

Micro SIM: In the era of smartphones, this SIM became smaller and lighter in size but it still had a cut part on the corner.

Nano SIM: This is the smallest SIM card used in most of today's smartphones. Although the size has reduced, the cut design on the corner still remains as its identity.