The most trusted source for old Nokia files is usually or the Internet Archive (Archive.org) .
If Over-the-Air (OTA) updates are unavailable through the device menu, you can manually update using the Phoenix Service Software Download Firmware: nokia x2-01 software update 8.75 download
For its time, the software updates for these devices were tiny—mere kilobytes or megabytes—but they were critical. Version 8.75 was one of the final significant firmware revisions for the X2-01. Users at the time reported that it brought essential stability improvements, better memory management for Java apps (essential for running Opera Mini or UC Browser), and minor UI tweaks. It was the polish that turned a decent budget phone into a reliable workhorse. The most trusted source for old Nokia files