For example right now using speedtest.net, fast.com or thinkbroadband test files I cannot get 4G+ to come on.
Go to youtube (on same machine) and select a 4k stream, 4G+ comes straight on.
Tried this about 20 times to try and see any link.
However, now is probably peak time (i'm getting speed within a single speed test bouncing from 5mb - 25mb).
Repeat the tests above later at night and everything flips in to 4G+ mode. One thing I see is that 4G+ only stays on for burst, it's never on constantly even when massive downloads are happening.
I tested this and it seems to be happening for me too. Youtube would get 4g+, actual downloads would get 4g+ but speedtests would not.
Exactly 9pm hits and I can get 4g+ on speedtests... odd!
It is odd behaviour so assuming it must be intentional. I've tried even now at this time and only getting 4G+ with You Tube, and browsing some websites. Speedtest.net has popped in to 4g+ only once in ten tries, and fast.com hasn't enetered 4g+ once.
For some reason Monday's here always give the worst speeds even compared to the weekend so maybe this is a way of them balancing traffic or maybe it's something to do with the protocols being used by you tube and websites. No idea. Interesting never the less