Firmware for the RTL8671 is not interchangeable with the RTL8676B. The bootloader (CFE – Common Firmware Environment) checks a hardware ID header before flashing.
Do not assume the update worked. Validate: Rtl867x Adsl Modem Firmware Update
Never download firmware from random “driver download” websites (e.g., driverupdate.net). These files are often malware disguised as .bin images. Check the MD5 hash against official release notes. Firmware for the RTL8671 is not interchangeable with
Before downloading any file, you must identify your exact hardware revision. RTL867x devices are notorious for having five different PCB versions sharing the same model number. Rtl867x Adsl Modem Firmware Update