Massive speed drop after 5pm

[bigjim]

I've been a three 5g home broadband customer for ~2 years now. I've had my problems but it's always been fairly decent... up until about a month ago.

We had a day where we could only get the slowest ~3-4mbps) download speed but it turned out there was work happening at the mast (info gotten from support phoneline and the network status checker). 5g came back up in the evening.

Since then every single day, once it hits 5pm my download speed drops from ~130 Mbps to ~8Mbps and my ping jumps from ~40 to ~240... clearly they have changed somethig.

I've tried moving the router to ever square inch of my house, restarting it, factory reset etc but no luck. Live chat isn't helpful - they just tell me to move it or restart it - they don't seem to understand and just seem to read from a script.

Has anyone else encountered this? Feels very much like some sort of rate limiting / throttling. Sadly I've no fibre options so it's this or Starlink which is considerably more expensive.

[Officina-red]

Do you have a 5g phone, does the speed drop on it as well ? 

[bigjim]

No, my phone is with a different provider and does not get a 5g signal at home.

[bigjim]

Network checker says no issues. I've tried contacting Three with little success. Live chat support is non-existent and phone support just ask if I want to cancel. Might give it one more try today.

[sc1999]

Have you checked the network status checker, it's possible that they are starting work at that time if there are a lot of business users. Contention ratio is another potential issue as people are arriving home and turning things on. One of your local towers, or an antenna on a tower is at fault so more traffic through the other cells. I know of a case where a Vodafone tower was down and they did not know as all traffic was going through another tower a few hundred metres away.

Failing all of this then you need to contact three.