LG PRADA KE850 - SIM Card Trouble

5. Trouble shooting
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5.10 SIM card trouble
Check Points
-Power control FET is working
-Socket soldering
-Proper SIM is used
J201
CLK
34
GND
I_O
6
RST
2
1
VCC
5
VPP
10K
R224
0.1u
C237
Q202
D
G
S
SI1305-E3
C236
22p
150p
C238
VA201
2V85_SIM
SIM_CLK
SIM_IO
SIM_RST
SIM_EN_n
Check
soldering all
pin of socket