> If the device was validating the server certificate, it wouldn’t make it this far, so that shows that our certificate was accepted.
One more very good reason for preventing requests to "the cloud".
However, I find it funny that the lack of proper certificate validation (which is a security issue in principle) is a pre-requisite for the "de-cloudification" process.
It would be even more appealing if you could show a test case where a high level metric (e.g., wifi download speed) improves with one of your lenses compared to a baseline scenario without lense.
Also, I expect the dielectric properties of the printing material will affect the design.
Which printing material have you tested exactly?
Do you know how much the performance changes when cheaper alternatives is used?
Note that 0 in dB scale indicates a 1:1 ratio with something, and not a zero in linear scale. Indeed, a zero in linear scale corresponds to -infinity in dB scale.
Fairphone 4 has been my main and only phone for several months now. Great experience, very good battary life. Performance-wise, I haven't noticed any significant difference compared to traditional phones. The only drawbacks might be the camera and thickness, but honestly I don't care much.
Of course, much depends on your use case and expectations. YMMV.
Don't know much about the invisibility cloak. But in wireless communications the "better smart mirror" idea is being investigated to achieve arbitrary reflection directions that defy Snell's law [1][2]. The objective is to hang these "mirrors" on walls/buildings and reflect the incident power towards areas where the reception is poor.