Install the latest firmware (currently on the US site only) and reset to factory defaults. If that doesn't work it might have a faulty 2.4GHz amplifier.

There are no published differences afaik. They are likely just a different chipset revision. If there are any performance differences they would likely be marginal as they all use the same underlying...

I have the 9020P UK. Thanks - will try EU version. Usually the production versions won't install cross region though... I also spotted on the US site an updated firmware for the WPA-8730 (which I...

It's on the US site only. The beta version I uploaded was 170601 whereas the new version is 170628. Hopefully TP-Link get around to uploading a UK / EU version...

Hi, where are you seeing the new firmware? It's not on the UK site under product support.

Maybe they will eventually get round to it on the UK site...