No. Firmware is the entire OS. Android 12 is a version of firmware. If you want Android 12, you must download a firmware build that specifically includes it (not all regions have received it for C30).
Without proper drivers, your PC won’t detect the phone in flash mode. Nokia C30 Firmware Download
| Error | Solution | |-------|----------| | ERROR: STATUS_BROM_CMD_SEND_DA_FAIL | Driver issue – Reinstall Unisoc drivers, try different USB port, use USB 2.0. | | S_BROM_DOWNLOAD_DA_FAIL | Wrong scatter file. Double-check model number. | | STATUS_EXT_RAM_EXCEPTION | Incompatible preloader – Find exact firmware version. | | Error: Status_sec_imghdr_type_mismatch | Secure boot enabled. Use “Download Only” not “Format All.” | | Phone not connecting at all | Battery dead – Charge for 2 hours. Or try another cable. | Install the driver manually: