the solution for Nokia X3 MMC memory card not detected problem when being inserted to the the device.
If the phone does not detect any MicroSD card being inserted to it it indicates that there is a problem on the hardware components.
This solution below shows which particular components needs to check and replace to fix this kind of memory card problem on nokia X3.
Nokia X3 MMC memory card not detected solution
In troubleshooting memory card not detected on nokia X3 you may first check the MMC slot for possible dirt and oxidation build up. Ensure that it is absolutely cleaned .
Check the MMC detection switch if not broken or damaged.
Check and trace the MMC supply voltage.
If all of the above has been done but still the problem still exists. proceed to rework the pearl chip.
This is the only final option for further deeper troubleshooting on nokia X3 MMC not detected problem issues.