When I worked on femtocells many years ago it was Apple who did their own thing with the signal strength bars, it was a source of massive frustration. They were

When I worked on femtocells many years ago it was Apple who did their own thing with the signal strength bars, it was a source of massive frustration. They were also the ones least receptive to reports of radio layer issues. Though coming back to the original discussion a lot of issues with 5g are backhaul problems which aren't indicated by the signal bar.