![background image](http://html.mh-extra.com/html/samsung/gt-c3303/gt-c3303_service-manual_1192217050.webp)
SAMSUNG Proprietary-Contents may change without notice
Level 3 Repair
8-22
This Document can not be used without Samsung's authorization
8-3-8. SIM Card Working
Check UCP200
SIM Connector
Break down?
NO
Change SIM300
YES
No
Yes
C357
= 3.0V
NG
Check SIM300
& Neighboring Circuits
Insert & Operate
SIM card
Check SIM_RST
(C355)
SIM_CLK(C356)
Change main chip
No
Yes