INSERT SIM PROBLEM?
2)OPEN HANDSET THEN CHECK THIS PARTS
A)BSI VOLTAGE MISSING PHONE SHOW INSERT SIM
B)CHECK EASY CABLE PORT OR PCB CONTCAT
C)CHECK VSIM LEG Ohms FIX MULTI METTER TO DIODE CHECKING MODE
a)(DIFFENT VALUE OHMS SHOW ABOVE 500ohms?----(VSIM VOLTAGE PREFECT)
b)(SAME VALUE OHMS SHOW?LIKE 200 Ohms TO 200 Ohms,(VSIM RELATED
CAPACITOR SHOTAGE)40%UEM(REMOVE RED MARKED CAPACITOR)
c)NOT SHOW ANY VALUE Ohms?(UEM NOT GENARATE SIM VOLTAGE 100MPROBLEM)BUT ONE THINK VSIM PRINT MISSING NOT SHOW ohms 
CHECK RED MARKED WAYS
D)REMOVE SIM IC THEN CHECK SIM CONNECTOR TO SIM IC WAYS
E)CHNAGE OR SHOT SIM IC
LAST CHECK UEM AND UPP
RESULT
1)SIM,BATTERY,SIM IC,SIMWAYS,CAPACITOR SHOTAGE ETC......65%
2)UEM............................................. ......20%
3)UPP............................................. ......15%