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Flow Chart of Troubleshooting
9-4. Sim Part
Phone can't access SIM Card
SIM300 pin 1 is "High"?
Check the circuit related to SIM300
No
Check the UCP200 or Change the PBA
SIM300 pin3 (SIMCLK) is working?
Yes
No
After SIM card inserted,
Check the UCP200 or Change the PBA
SIM300 pin 2(SIMRST) is "High"?
Yes
Check the SIM Card
Yes
END
9-8
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