@gerzs Connect your computer to the internet directly and verify whether you can access internet, if it works well, please connect it back to the Archer C6 by wired cable. And then log into the web...

@Bugo The TL-MR3420 is a 3/4G router, if you want to use it as a regular 3/4G router, you need use it with a 3/4G modem. Below is the compatibility list of the 3/4G modem....

@Vgozzy Please verify whether you have assigned a static IP for NAS. And the IP address of the NAS should be in the same subnet as the main router. Good day.

@HALMAT Can they access internet with them connected to the Archer C58HP? Have you ever tried to use your computer to give it a shot? Like can you cast to the smart TV or the chromecast? Good day.

@DheerajY What is the bandwidth you paid for your ISP? And what about the current wireless speed you can get from the TL-WR841N? Have you ever tried to change the wireless settings, including...

@daftpunk Try to log into the web UI via 192.168.1.1 or tplinkmodem.net. If it still does not work, please click here to get the IP address and gateway of your device which connects to the TL-MR3040...