@Dennis_May Are you referring to the 4G Mi-Fi? You can check if these models can meet your requirements: https://www.tp-link.com/home-networking/mifi/

@Jerry_K Can you confirm that AX55 is working in AP mode? If yes, you cannot set up a Onemesh network with the extenders, as Onemesh is only available in Router mode. Please check and ensure the...

@mayone Regarding your inquiry, I would recommend you leave your message in this thread below: Archer MR600 VPN client

@Pedr0x Can I know who is your ISP? Have you confirmed if you can get a stable connection by wiring a computer directly to the ISP modem already, maybe with the same ethernet cable that connects to...

@jvachez If you want to connect and extend a 5G DFS network, it's suggested to get a range extender that supports DFS, such as RE605X.

@TheOneGuy You can go to System Tools > Backup & Restore > Backup. While I'm not sure if you can import the backup file into the new firmware. You can give it a try if you need to do that.