blank, writable, programmable SIM card used for testing and development in telecommunications. It is designed for professionals to customize network settings, develop applications, and test new configurations. The card is rewritable and can be programmed with essential parameters like IMSI using specific card readers and software tools. It is compatible with 2G, 3G, and 4G networks. The card is a "three-in-one" size, meaning it can be punched out to fit standard, micro, or nano SIM slots.
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