This is the solution for Nokia X3-02 if an insert SIM card error problem occurred. This solution shows the connection line (tracks) of each of the sim card pin connector for easy tracing procedures.
The touch and type Nokia X3-02 sim card slot is attached on the flex board together with the numeric keypad matrix and the microSD memory card slot. In troubleshooting sim card not detected problem, you may first check the said flex board for possible damaged and then replace if necessary.
You may check the VSIM voltage and trace each of the corresponding sim card pins connection.