8-3-4. Sim Part
Insert SIM card
Check the Pin Soldering
Check the SIM Voltage.
(R312) >= 1.8 or 3.0?
CP_VSIM
R322
SIM300
6 6
1
1
5
5
2
2
NFC_SWP
4 4
3
3
SIM_IO
G G
G G
7
8 9
10
C345
C346
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Yes
of SIM300
Yes
Yes
END
NFC_SIMVCC
CP_VSIM
R310
R309
OPEN
SHORT
SIM_RST
SIM_CLK
C347
C348
C349
No
Resoldering and recheck
Change to the new SIM card.
No
If it doesn`t still work SIM card after changeing
the SIM card, Check the UCP300 (Crack etc)
C276
C215
C212
8-11
Level 3 Repair
C202
C242
C245
C246
R200
C206
C207
SIM300