Before proceeding, please note that Nokia discontinued official support for Series 40 devices years ago. This guide focuses on archived, legitimate firmware files and community-recommended flashing methods.
Flashing firmware carries a risk of "bricking" the device (making it unusable). Only proceed if you are comfortable using service tools. Firmware Update on NOKIA X2-01 - HardReset.info nokia x2-01 software update 8.75 download
If you want, I can search for specific download links and a step-by-step flashing guide for your X2-01 RM variant — tell me your RM/product code (from under the battery) or confirm you want me to look up likely sources. Only proceed if you are comfortable using service tools
Since Nokia's official Ovi Suite no longer provides updates, users typically use specialized tools: Phoenix Service Software Version was the final maintenance release
The Nokia X2-01 originally shipped with various firmware versions, typically between 6.xx and 8.xx. Version was the final maintenance release. Here is exactly what changes when you successfully install version 8.75: