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Flow Chart of Troubleshooting
10-1-2. Sim Part
"Insert SIM is displayed on the LCD
Yes
No
Check the SIM connector's
(SIM400) connection to
Resolder or change
SIM400
SIM card
Yes
No
Check the voltage at pin#1
Check the PMIC
of SIM400 >= 3.0V ?
Yes
No
Is there any signals
Check the PMIC
pin#2,#3,#6 of SIM400 ?
Yes
Check the SIM Card
END
10-4
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