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9-1-3. SIM Part
"Please insert SIM card "
Check the SIM502's
Connection to SIM card
Check the voltage
at SIM502 pin #1 ≒ 2.85
There is any signal
pin#2,#3,#4 of SIM502
Check the SIM Card
SAMSUNG Proprietary-Contents may change without notice
YES
YES
YES
END
This Document can not be used without Samsung's authorization
Flow Chart of Troubleshooting and Circuit Diagrams
NO
Resolder or change SIM502
NO
NO
Check the U503 & UCP101
** Check SIM's signal
when you see SIM checking display
9-5
Check the U503
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