SHA-256 (example) for valid v11.40: 9f86d081884c7d659a2feaa0c55ad015a3bf4f1b2b0b822cd15d6c15b0f00a08
If the phone works fine now, do not update. The risk of a failed flash (see Part 5) often outweighs minor fixes.
Key specifications included:
This article explores the history of the Nokia C2-01, the importance of the 11.40 firmware update, and the technical reality of finding and installing this software in the modern day.