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Flow Chart of Troubleshooting
9-4. Sim Part
Phone can't access SIM Card
Yes
①
No
Check the pin 1 of SIM300
Check the circuit related to
SIM300
Voltage = 3V
Yes
②
No
Check the SIM connector's
(SIM300)
resolder or change
SIM300
connector's to SIM card
Yes
③
No
Check the circuit around SIM300
Check the related circuit of
SIM300
input circuitry
Yes
END
9-11
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