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Level 3 Repair
8-3-3. SIM Part
Insert SIM card
Yes
No
Is SIM socket ok?(SIM402)
Replace SIM socket.(SIM402)
Yes
Change the SIM card,
No
Check the SIM Voltage.
(R421) >= 1.8 or 3.0?
or check the U400(Crack etc)
Yes
END
8-9
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