(2) SIM Card Not Detected
Symptom: On the Modem Management page of the WEB UI, SIM Card
status shows "Not Inserted" and the Log shows "-> AT+CPIN?" followed
by "<- +CME ERROR: 10".
Figure 46
Analysis: Possible reasons include SIM card not inserted properly, loose
SIM card, damaged SIM card, or faulty 4G module board.
Solution: Verify SIM card readiness, replace SIM card if necessary, or
replace the 4G module board.
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