No complaints, 100-300Mbps on average. They seem to have done great at the 5G spectrum auctions, they’re the only UK carrier with 100+ Mhz.

I’m also using them for mobile 4G and yes that’s often awful, as others are reporting. I should probably switch to giffgaff (safer to use different providers anyway in case Three has a catastrophic outage), but Three’s "Feel at home" free roaming in many countries beyond the EU (including the US) is super handy and has no equivalent that I know of.

I suppose this will improve when they build out the network more, but even in locations with strong 5G signal the speed seems to vary a lot.

Seems like 3's 5G network has still not actually launched, but they're now promising it "by the end of February".

Is 3's SDL in addition to their carrier aggregation ("4G+") rollout? Because I already have that and it doesn't seem to have helped much!

The networked sucked at first but they are slowly improving things and offered far better customer service and contracts than the existing 2-3 monopolies.

But sadly if you really want the cutting edge of speed and spectrum you need to use one of the monopolies.

Isn’t this argument basically debunked? Places like South Korea and Japan have no issues whatsoever with extremely fast wireless internet at a fraction of the price.