A flash file indicates that the firmware has been verified on a working device to ensure it is not corrupted and is free from bugs that could further damage the phone.
nokia 110 dead problem solution | Nokia TA 1302 dead solution Nokia Ta-1302 Flash File Tested
The Nokia TA-1302, also known as the Nokia C2 (2020), was a popular entry-level Android Go device. It was cheap, durable, but notoriously finicky. One wrong OTA update or a corrupted user partition, and it would slip into a deep, irreversible coma. A flash file indicates that the firmware has