Why do SIM cards have a cut on corner? Here’s the hidden reason behind it

Why SIM card has cut on corner: The cut corner on a SIM card is known as a “key.” Its main purpose is to ensure that the card ...
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SIM card: Why is one corner of a SIM card cut off? It's not a design choice; the reason is related to phone security.

SIM Card Design Technology: Have you ever noticed that every SIM card has one corner cut off? This isn't just for aesthetic purposes. There's a technical reason behind it that protects both your phone ...
Ars Technica

Question to those who have cut down their SIM cards

I bought a SIM-to-microSIM cutter and I tried it on a deactivated SIM card. It was easy enough to do, but it also takes out a small portion of the top of the metallic portion. I put the card in my ...
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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 ...