@Qausian Can't you enable the 5G network on the Archer C6? The router firmware seems quite old, please update the router firmware to the latest version first, then reset it to factory defaults,...

@MajkAdamko Same LTE dongle? The model is huawei E3372h-320? If that is the case, we will send you the beta firmware to confirm.

@JasonJJ Have you tried all the basic suggestions we provided here? If yes, please check the below and report back with the necessary information, then we can help further: 1. Who is your ISP? What's...

@GophalRaj When the Windows 10 laptop connects to the network of the WR841N, how about the LED status of the router? You can also login to the router web interface to confirm if there is still a WAN...

@Falcon14 Vetal could be right, you need to verify what is the country code and hardware version of your Archer C6, if it is EU 2.0, then download and install the latest firmware for that version...

@omegadoom Are you referring to the L2TP/PPTP connection on the router WAN? If that's the case, that is the WAN connection provided by your ISP, so you need to confirm with them, whether you should...