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Level 3 Repair
8-22
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8-3-8. SIM Card Working
Check UCP200
SIM Connector
Break down?
NO
Change SIM300
YES
No
Yes
C357
= 3.0V
NG
Check SIM300
& Neighboring Circuits
Insert & Operate
SIM card
Check SIM_RST
(C355)
SIM_CLK(C356)
Change main chip
No
Yes