@Chky Hi, thank you very much for the feedback. Can you add some screenshots of the network map on the Deco APP, such as the following picture: Have you seen any Deco turn red during the...

@Villeoh1jd Thanks for the update. What model number of the EdgeRouter, such as ER-4 or ER-12? Is there any customized firewall system deployed in the network? If we only leave the main Deco X50...

@mr_uef Hi, you can refer to this link to test the OpenVPN config file on the mobile phone: How to set up OpenVPN Client on Android Phone and iPhone

@Barri Hi, welcome to the community. You can refer to the suggestions here- Scenario 2 How to set up 3G/4G/5G Backup on TP-Link LTE router under wireless router mode Thank you very much. Best regards.

@Oliviamcx Hi, welcome to the community. May I know your SIM ISP? It is suggested to set the PDP type to "IPV4 only" to see whether it helped: By the way, what is the model number of the other...

@MadMarx Hi, welcome to the community. May I know your SIM ISP? Can I have a screenshot of the internet status on your Archer NX200, such as the attached picture here: By the way, how much of the...