Samsung SGH-E770 - SIM Card Troubleshooting

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SGH-E770 Flow Chart of Troubleshooting
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2-7
2-1-3. Sim Part
The voltage is 2.8V
at the pin #1 of ZD307?
Check the UCP301
"Insert SIM" is displayed on the LCD
END
Check the SIM Card
YES
NO
NO
YES
Is there any signal
pin #2,3,4 of ZD307 ?
Check the UCP301 & UCP201