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Level 3 Repair
8-12
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8-3-4. Sim Part
Insert SIM card,
Can't recognize SIM
Check the connection of the
HEA300
Reconnect the Sub PCB
Yes
Yes
No
END
After inserting a SIM card,
Check
VREG_USIM_1.8V(C527)
= 1.8V or 3.0V
Change other SIM card or Sub PCB
Yes
No
Is the SIM recognized ?
Resolder or Replace U501
Yes
No