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How do I use the hot plug function of the SIM card?
1) Design the SIM card deck of 8 pins based on the HD instruction and check the SIM_PRESENCE pin of the connected modules.
2) Start the SIM card detection function by AT command.
AT + CSDT = 1 //Start the SIM card detection function.
AT + CSMINS = 1 //Start the plug-in state report of the SIM card.
For details, please refer to the ATC manual for details.
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