![background image](http://html.mh-extra.com/html/samsung/sgh-b100/sgh-b100_service-manual_1190325037.webp)
SAMSUNG Proprietary-Contents may change without notice
Flow Chart of Troubleshooting
10-6
This Document can not be used without Samsung's authorization
10-1-3. Sim Part
Check the voltage at
pin#1 of SIM300 >=
2.8V ?
"Insert SIM is displayed on the LCD
Check the SIM
connector's (SIM300)
connection to SIM card
Check the
UCP300
Resolder or change
SIM300
END
No
Yes
Yes
Yes
Yes
No
No
Is there any signals
pin#2,#3,#4 of SIM300 ?
Check the
UCP300
Check the SIM Card