Wifi Disconnects on 3.1005? Mudi

I do not know why but i have tried the newest Firmware and i can’t not keep wifi connected to it at all. Everything from my laptop/xbox, tablet and smart stuff disconnect at the same time and a little bit later it reconnects but as soon as data goes threw it. It disconnects. Whats going on? I cant revert as my only PC doesn’t have a ethernet port.

First, you can try to reset the router using the reset button, which is under the SIM cover.

Then you have to get one device connect. Otherwise you can change firmware.