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Flow Chart of Troubleshooting
9-1-2. Sim Part
"Insert SIM is displayed on the LCD
Yes
No
Check the SIM connector's
(SIM700) connection to
Resolder or change SIM700
SIM card
Yes
No
Check the voltage at pin 1
Check the UCP300
of SIM700 >= 2.8V ?
Yes
No
Is there any signals pin2, 3,
Check the UCP300
4 of SIM700 ?
Yes
Check the SIM Card
END
9-4
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