Full fibre. Wifi/Internet drops, slowness. Samsung s23 ultra

[LagrangeL2]

My wife's iPhone shows no issues but despite a restart and a monthly update being applied, my mobile experiences NUMEROUS instances of wifi/Internet pauses/lack of online response and full disappearance of WiFi (WiFi icon will disappear and/or it has a warning exclamation mark). Apart from the WiFi icon dissappearing, I can't confirm if the Internet/fibre link is also at fault. The router is literally 3 metres from me. 

[LagrangeL2]

Done

[LagrangeL2]

I downloaded the log but it's all unintelligible to me. I honestly wouldn't know which portion's merit your or other's opinion. And I don't think it reasonable or fair to literally dump it all on you or others. It's not that I don't appreciate your offer! 

[CrimsonLiar]

@Jayach I don't think the AI is that good yet

[Cynric]

@LagrangeL2  Go to the settings in your router and check because that video may be out of date. On WiFi 5 keep the channel width at 80 or less. 

As I said earlier, there are a load of results on Google search and many are not solely about WiFi6.

[LagrangeL2]

Samsung support have suggested a factory reset followed by possible repair. Vodafone suggested initially splitting network into 2.4 & 5 GHz networks. Curiously, my phone is connecting to 2.4 GHz despite being less than 3m from router: I'd assumed it would be 5Hz. Definitely just a curiousity rather than a smoking gun though. 

[Cynric]

@LagrangeL2  Don't get too close (less than 6 feet) to the router because the device can be overloaded with the strength of the WiFi signal.

[LagrangeL2]

Who knew THAT was a thing. 😁😁😁

[LagrangeL2]

Soooooo.... Split the network into 2.4/5 GHz last night as requested by Vodafone. I'm currently on 2.4 (usefully, it uses the same SSID) and, touch wood, I'm NOT experiencing the same problems as the past few days. I was asked to test for a day but it looks promising. Though I think I've always connected to 2.4, I'll switch to 5 GHz to see it works fine. Then I'll call Vodafone and ask why. 😊 Any thoughts from anyone as to what the underlying issue might be? Why would it just be my Samsung phone which appears to be affected? The network split suggests a router issue but I guess it could be a combination of how the mobile and router are interacting. 

[Cynric]

@LagrangeL2  It could also be a Samsung problem. Don't forget that WiFi 6 uses a combination of 2.4 and 5 GHz frequencies.

[LagrangeL2]

I've changed my WiFi to connect to the 5GHz band. Internet then paused. Check WiFi and it had switched back to 2.4. Switched off "auto reconnect" and connected to 5Hz again. Within minutes, I had lost WiFi and I had to manually reconnect to 5GHz. The issue seems to boil down to how 5GHz is implemented on samsung and how it maintains connection; or how the Vodafone router handles 5Ghz connections; or a combination. Yeah, I know, that's a wide net. Given that no-one else has issues, I suspect the Samsung phone. But, if that's true, why did I not have issues with dual band Virgin router we had before? Anyway, bottom line is stick with 2.4GHz band.