Nokia released its first major firmware for Nokia C7 (RM 675) for all Versions.
The new firmware should be available in a few days via NSU or OTA.
There is no changelog, because it’s the first and initial firmware.
This firmware is for RM675 for all countries and regions.
you can check here your product code, if it’s available for you, too. or start your Nokia Software Updater (NSU).