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GSM – (SIM Card)

SIM cards (Subscriber Identity Module) are smart devices used to safely store different types of data, such as the user’s identity, location and phone number, network authorization, personal security passwords, contact lists and text messages. The security characteristics of these SIM cards involve authentication and encryption to protect them. They are available in different sizes: 2FF, 3FF (Micro), 4FF (Nano).

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