SIM card is a very useful component for our smartphones, laptops, computers or other internet related devices.The SIM card was first developed by renowned smart card makers Hermann Giesecke and Alphonse Devrient from Munich, the capital of the city of Bavaria.Older SIM cards were much larger and rectangular in shape than modern SIM cards today.But after all, why did all the telecom companies have to change the design of the SIM card and why is one corner of the SIM card cut off today?
Let's know in the video.....

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