The latest known firmware for the VMG1312 can be found on our downloads site below.
Depending on the version of the device, you will need to opt for the specific version for your router.
B10A - https://uno.help/downloads/zyxel/VMG1312-B10A/
B10D - https://uno.help/downloads/zyxel/VMG1312-B10D/
Please note, that a firmware for B10A cannot be used on B10D and vice versa and should not be attempted.
These firmwares can only be downloaded by our broadband customers connected to our network.