@Astroid94 Here are a few things we need to confirm to locate this issue. What is the led status of the two Decos? With a computer connected to the slave Deco by wired cable, can it access internet?...

@SrDarkWarrior Sorry that there is no ETA yet, it is suggested to keep an eye on official websites for more updates.

@kenbish13 Hi Ken, you can connect the Deco M5 to a TP-Link 4G router with SIM card by ethernet cable. The 4G router does not support bridge mode. And the main Deco has to connect to the 4G router by...

@StefanJ Like Speedtest®. There are many similar Softwares available nowadays, you can give it a go.

@ct2020 Haha. You can enjoy the mesh network then. If need any further help, be free to let us know.

@vsMARTINO You do not have to open the ports for the server on the main router cause you have done that on Deco M5 already. To make the server work, the internet IP address should be a public one....