Fritzbox Repeater 6000 in the children's room?

There he neighs again... and is not even aware that he contradicts himself.

Are you addressing me here?

And whoever thinks a smartphone emits as much radiation as a WLAN access point can try setting up a hotspot with their smartphone as an experiment. Ridiculous, it usually doesn't even get through the interior door.

If you mean me here as well: I never spoke about what the phone does when using WLAN. I said that a phone increases its transmission power in the mobile network when it has “poor reception.” The transmission powers in GSM and LTE exceed those of WLAN significantly depending on the frequency.

That's why I always laugh my head off when someone supposedly makes their house radiation-proof (as if that were possible). The whole house gets pasted with chakra-proof wallpaper and all the curtains are woven from elf hair & silver threads so that "no GPS signals get in" – well then, the phone just cranks up its power and that's that. It doesn't take much power for that little astral stuff.

The Wi-Fi repeater isn't allowed in the children's room but the DECT baby monitor is – and the phone is put on the nightstand at night, of course online, so you don't miss anything. Well, sure, you can do it that way.

Just so we don’t misunderstand each other: I am fully aware that rooms can be built to be radiation-proof. I once worked in one professionally for a while. But that’s not accomplished with a bit of astral wallpaper and an elf hair curtain from the miracle healer shop.

The high number of APs (eight for WLAN plus the Zigbee nodes) is not only because of bandwidth but also so that the individual devices don’t have to run at full throttle all the time. And yes, GSM over WLAN is mandatory here because the network is simply too bad and already crumbles massively on the ground floor; go down a step to the basement stairs and it’s definitively gone.

what do people do in apartment buildings? In the cities, the list of available WLANs is 2km long. They all must be radiated.

well, if I look and listen to our neighborhood, you are anything but wrong with the latter statement...

2.4 GHz: endlessly long list, the network is so dense that I plan to replace devices (and have partly already done so) that do not support 5 GHz WLAN...
5 GHz: 'only' full, significantly better (or at all) usability than in the 2.4 band...