Note: Do not interrupt the process. Removing the battery or losing signal during an OTA update can "brick" the device, rendering it unusable.
Here is your checklist:
Select to download and install available updates. Method 2: Nokia Software Recovery Tool (Official PC Method) Firmware Update on NOKIA X3-02
If you are attempting this on a phone that has never been updated, or if you have a device running a very early firmware version (pre-V5.60), you might try this procedure: Note: Do not interrupt the process
For advanced users and repair technicians, the only remaining method to update or flash the firmware is using third-party service tools. Firmware Update on NOKIA X3-02
: Install the Nokia Connectivity Cable Drivers and the Phoenix software on your PC.