Slow internet connection on Android phone, while no issues on other home devices

lesssugar

lesssugar

lesssugar

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Joined
20 Aug 2022
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4
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Germany
I'm having an issue with the WiFi connection on my Android phone (OnePlus 6, Android 11). For the past few days, some apps started to work slowly, I see spinners all the time, indicating that the contents of the apps cannot be loaded.

As soon as I switch to mobile data (LTE) everything is OK. Also, other home devices (2 laptops and an iPhone have no internet issues).

What I tried:
  • Changing the position of my router. No luck.
  • I used a WiFi Analyzer app to find more optimal channels to use and I manually set them on the router. At first, setting a channel helps (the slow apps start working well again), but after a while (after 1-2h), the problem comes back and the apps become slow again.
  • Also, when I set the channels for 2.4 and 5GHz to "auto", the same thing happens: first all works nice and well, then it starts lagging.

The router provides both 2.4 and 5GHz frequencies, applied automatically whenever possible. My internet speed is ~500Mbps.

The problem occurs both when using 2.4 and 5GHz. For example, I'm connected on 5GHz now and I'm having the issue now, and here's my WiFi analyzer graph for 5GHz (my connection is in red):

aQl0KjK.jpg

Is it my phone or is it my network? No clue. How can I troubleshoot this further?
 
Does your router show you how much data your phone is using on Wi-Fi? Is it possible that a malicious application is transferring a lot of data and slowing things down? Are you using a VPN (if you go to something like ipchicken.com on your phone and on your desktop PC, do you get the same address)?
 
I don't use a VPN (also checked my IP and it's the same for my desktop and my phone). I have 2 apps that used 6GB+ of data in august but these are mainstream apps (9gag, Chrome), so nothing suspicious here. Unfortunately, I can't see any info on my router regarding data transfer per device.

Additionally, I tried splitting the network (separate 2.4 and 5GHz) instead of using auto steering. No change. Everything I try works for a bit, but then things get slow again. No clue.
 
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