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Mobile data connection troubleshooting: Difference between revisions

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'''Note:''' reboot the module if it fails to identify SIM
'''Note:''' reboot the module if it fails to identify SIM


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*Use command '''AT+CREG''' to check GSM connection:
 
* Use command '''AT+CREG''' to check GSM connection:
  ...
  ...
  AT+CREG?
  AT+CREG?