@enfegu Hi, you could use RE700X as AP mode, which could connect the main C80 router via Ethernet cable, but no mesh network. If you would like to build a mesh network via Ethernet connection, you...

@jra11500 Hi, thank you very much for the detailed information, I've forwarded your case and the details to our senior engineer, and you could continue debugging the issue with them via email...

@Shiva_ Please make sure the PDP Type for VI SIM is IPv4 only, If the internet status is still disconnected, please share with us screenshot of your Advanced->Status page, Advanced->Network->Internet...

@ASHOKNATH377 Hi, XC220-G3v is a model for ISPs, we community don't have its information, it is recommanded to contact your ISP or local support team in your area.

@iomari Hi, please download and update the latest firmware from the link below: Firmware Download for TL-MR3420 V5 If the problem still exists, please let me know the network topology, whether WAN IP...

@Moutsi Hi, you mean the settings cannot be saved or it is saved but the port doesn't open? Please also check Internet IPv4 address on Advanced->Status->Internet page to see if it is public IP...