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For certain applications or configurations, the internal battery may not be installed. |
After installing the SIM card, if the modem SIM LED is flashing (GREEN if SIM Slot 1 is used or RED if SIM SLOT 2 is used), this indicates that the SIM card is not being detected. Please remove and examine the SIM card, add backing tape as described above, or replace it if the SIM card is still not detected.