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What is Telecom’s remote card writing white card used for?

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According to your description: When selling cards, the business front desk will read the corresponding code number in the headquarters CRM system through the card writer based on the number selected by the user. The IMSI data is written to the telecom smart card, and the data is loaded on the network side to complete the service activation. The on-site card writing business is mainly used for local on-site account opening, local card replacement business and off-site card replacement business

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