Can you install a terminal app one of the Android devices and see if you can ping out to the internet (8.8.8.8 or similar). This sounds like DNS is getting messed with.

Do you do any whitelisting of MAC addresses? The mobile devices change their MAC addresses often.

Do you have any new electronics in the house? They could be interfering.

dude!

my mobile devices have been doing the same thing and I've been tearing my hair out for a fix.

do we both (by chance)

have Mullvad VPN set on the router?

I have a SBC acting as router and every interface that goes to Mullvad has this problem.

I have other interfaces that arent forced through VPN and they're unaffected.

ill contribute towards a bounty if its the same problem.

help a brother out!

(I'm having the same problem!)

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Ditch Routers/WiFi. Get an unlimited 5G data plan, and use your phone as a hotspot when you need to access internet on your pc.

Some devices may have problems with IPv6. Try disabling IPv6 in the router settings and see if that helps (Modifying the DNS server directly on the router could also be something that works).

On the affected devices, go to the Wi-Fi settings, "forget" the network, and then enable MAC Spoofing if available, and reconnect by entering the password again.

Try temporarily switching to a less restrictive security setting (like WPA) to see if that resolves the issue.

Try connecting one of the problematic devices to a mobile hotspot (like your phone's) to check if the issue is specific to your network.

Make sure DHCP is enabled on the router. This allows the router to automatically assign IP addresses to connected devices.

Try setting the router's power like this:

Channel 149

Channel width of 80MHz

30 dBm power

you'll need to use process of elimination.

first, does the problem device have a connection to the local network? (sounds like yes). is it in the same IP range as your other working devices?

then, check dns, can the device connect to or ping an outside ip address? (if yes, the problem is DNS)

find what DNS servers the devices are using, vs. the working machines. (if different,

Does those devices work fine in public networks ? Like Starbucks or Library..

You don't have an open source router? 👀

1) Newer mobile phones support MAC address randomization per default. There should be 3 settings for your SSID:

- use per-connection randomized MAC

- use per-network randomized MAC

- use device MAC

Try 2nd or 3rd, it may help.

2) It could also be related to using "private DNS mode" in the "Network & Internet" settings menu. Try switching it off.

3) Can you access your routers' internal IP in a Browser on your phone, i.e. http://192.168.0.1? If yes, it looks like a DNS issue.

Wouldn't personally use ISP router, get a good router that you can customize and control, use ISP router for it's internet access only.

I am curious because this happens to me in the office, I always figured it had to do with IoT (internet of things).

GM Folks ☕

Quick update - I changed nothing and it was fine all day yesterday 🤷‍♂️

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There was a time where people would simply help out without the need for a bribe, I miss those days. 😞