I am not sure about the hardware version-where can I find this? I am testing the speed, and the Deco is performing well when testing the signal to the Deco. Typical values of >600 Mbps for both download and upload.

But when testing the actual speed on the devices connected by wifi to the mesh network-the performance is quite poor. Typical values of about 70 Mbps for upload and about 20 Mbps for download. I have measured the wifi speed on PC, iPad and iPhone.  

What should I do in order to increase the wifi performance? Or does this indicate that there is something wrong with the Decos? I have run the network optimization and updated the Decos.

I think the Decos should be "plug&play" so I am not pleased with the performance I am experiencing.