Hi, What is the model number and hardware version of the device? Please connect your cellphone to the TP-Link's wifi and then test whether it can be found. Good day.

Thanks for your reply, if need more help in the future, do not hesitate to contact us.

Hi, Thanks for your reply. Just take your time to install it and test the performance. Any updates, please let us know. Nice day.

Hi, Do you want to connect the 841N to the VPN server to access internet or you just want to connect to the VPN server to access the local sources? While if you want to select L2TP as internet...

Hi, Sure, below is the download link of the firmware for 940N. https://www.tp-link.com/support/download/tl-wr940n/v6/#Firmware Please verify the hardware version first....

Hi, Below is the instruction to setup IPV6 on the Archer D9 you can give it a shot. https://www.tp-link.com/support/faq/857/ May it help and have a nice day.