I've been round at my daughter's this weekend and her whole family complained to me about their internet.
I did a speed test using my phone and got 2.69Mbps down and 0.26Mbps up. Usually it's considerably better as it's a good ADSL2+ line.
She doesn't like the router as it doesn't fit in with her décor sitting as it does on top of a shelving unit in the corner of the living room.
I glanced at the router lights, or I would have done if the router was there but it had been moved to the bottom shelf directly alongside the DECT house phone.
The router stats look ok
|Current Rate (Kbps)
|Max Rate (Kbps)
|SNR Margin (dB)
|Line Attenuation (dB)
so I'm suspecting the DECT phone.
When I get the chance and my daughter is out of the room I'll relocate the router on top of the shelving unit.
Windows 10 Firefox 109.0 (64-bit)
To argue with someone who has renounced the use of reason is like administering medicine to the dead - Thomas Paine