WLAN reception on the mobile phone, but does not receive anything?

Since I moved, I'm trying to execute my internet. I still use my old FritzBox 7272 router, and since I live in a student flat, I've infected the now via LAN cable to the wall outlet. With the Wlan generated by it, I come with the phone to the Internet, but the whole thing is not on the PC or my laptop, it is displayed, but the devices can't connect with it.

What can the devices not connect to?

With the WLAN or the Internet?

In which.

Check it out, please, if laptop and computer can connect to the WLAN. Sounds to me as if the problem were there.

Both devices seem to get no connection to the router. That can be a lot

Is it possible that the number of connections will somehow be limited?

Which variants to set up the Wi-Fi you have tried

Either that's about the Wi-Fi icon in the system tray

Or open an Internet Explorer enter because…