I recently bought xx530v. But its giving only 50mbps downloading speed on pppoe. I searched and found that there is an issue on latest firmware with mac clone. Can someone provide me oldest firmware d

I installed this device in my house, put fiber directly on it, it registered without issues. But I noticed a odd issue: Any download is always capped at 50Mb/s (my plan is 500Mb/s for both downloads a