@FrankJr.-29_ Here you can grab Archer C6(US)_V3.20_210513 update. Unzip and proceed with manual update. The link is from Australian support portal. For some reason the FW for C6 v3 was not available...

@oldcelt Well that's it - Model: Archer VR2800(EU) Ver: 1.0 HW v1, FW region-EU Here's the FW releases for your device. Hint: blue text is a hyperlink which leads you to the specific resource.

@oldcelt On the bottom sticker you can find the HW version and FW region of your device - just follow the guide. The following screenshot might help setting up your Internet connection: Your...

@JM98 As I understand a tough place to bring an Internet connectivity. I forgot to suggest that you could make a device current configuration backup, once when in DSL Modem Router Mode and once when...

@buyshirts1 In general TP-Link recommends to have the latest FW release on your device. The 4503 error could indicate that you're trying to update the device FW with a release for a different HW...

@WellConn That should pass the VLAN ID from the ISP in bridge mode: