How does resetting a router fix wifi?

I have a similar problem with our Talk Talk router the wireless is always dropping out but anything that is wired ie this pc and the tv boxes in the living room and the bedroom doing catch up works perfect even restarting doesn’t fix it sometimes even after a replacement router. Wireless there are 3 phones and an Xbox connected not all at the same time. Its my eldest live at home son who suffers most due to his ping being high and connection dropping whilst playing fortnite so it may not be a bad thing

Wifi extenders from my experience seem to work best (ironically) when the parent wifi is really strong and therefore when you don’t really need them. I agree they seem to be fairly flakey all round. I know a number of people who have had Sky round to install them for Sky Q (due to remote miniboxes playing up) and rarely has anything improved (bespoke case I’ll admit). As came up in another thread using your own router is cheap enough these days and a decent mid-range one will outperform what came free from your ISP, as well a providing typically many more features and better troubleshooting.

Dave Rice wrote:

Where your BT socket sits is not usually a good place.

Is there a maximum length for the cable between the router and the socket (RJ11?), or are there better quality cables? I’ve got a 2m cable on mine so I can move the router away from the corner.

The problem with extension cables is that a lot of them are poor quality.  Some don’t even use twisted pairs which is a big no no for broad band.

Dave Rice wrote:

You know what I’m going to say Get an independent AP that’s up to the job of a modern household. A Cloud Managed Ubiquiti UAP-AC-LITE (1200Mbps AC) is £78 and if you buy it from Broadbandbuyer they will set it all up for you. All you do is plug it in. The Cloud Controller lasts 3 years after which time you can set up your own (loads of How To out there and a Pi will more than do) or just leave it. It doesn’t need the controller to function day to day.

Did I see somewhere you suggesting this instead of a homeplugs? It looks like we’ll be moving my home office upstairs and away from the back room, where it currently is and wired in with a Cat6 cable under the floorboards (installed prior to my purchase of the house). With it going upstairs, I’m looking at my options. I can get wifi in the bedroom – seems to work Ok for browsing on the phones, but when I get round to moving the PC up there, things might get a bit slower with NAS access and the like so I’m in two minds as to upgrade the wifi and get a wireless bridge upstairs, or to get powerline plugs.

Current router is a Netgear AC1900 Nighthawk Modem Router.

My Asus job to keeps dropping out. Has been for about a year, but I have that much iot crap now, I just cba swapping it all over. I’m sure it will all be simple and the thought is worse than doing it. One day. One day.