This is the most common form of "verified" file. A user has extracted the firmware from their own device, often with superuser (root) privileges enabled. Flashing this can unlock hidden menus, but it carries the risk of carrying over the previous device's specific configuration data, which can cause conflicts.
If you are trying to with your HG6245D, let me know: What is the current firmware version ? hg6245d firmware download verified
Via alternative firmware installers (OpenWrt): This is the most common form of "verified" file
If you have obtained a verified firmware file from your provider, the manual upgrade process typically involves: hg6245d firmware download verified
: A version frequently used by PLDT; however, security researchers have noted that it and earlier versions contain known vulnerabilities