Level 3 Repair
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8-8
8-3-3. Sim Part
Insert SIM card
Is SIM/SD assy well
connected to main board?
Yes
Yes
No
END
Check the SIM Voltage.
(C6 of SIM FPCB) >= 1.8
or 3.0?
Reassemble SIM/SD assy and still SIM
does not work, replace SIM/SD assy
Change to the new SIM card.
If it doesn`t still work SIM card after changing
the SIM card, Check the U300 (Crack etc)
Yes
No