RSSI (dBM) expressed as a bar; since its a negative number, maybe expressing signal strength graphically was the only way to go.
Meantime, there have been developments on my reception issue. I don't want to say too much, as I don't want to cause issues for Cell C - suffice it to say that my site is experiencing reception issues.
My closest cell (+/- 300m) is somehow not operating optimally. The result is that I can often pick-up a more distant cell. Cell C's contractor has observed something is not right and this will be tweaked shortly.
I've got my fingers & legs crossed!
I'm not chasing speed here (that's would be a bonus) I just need a stable 1-1.5mb downlink which doesn't periodically drop down to EDGE, sometime for hours. I should hear something in the next few days!