The great news is that I've gotten my cellular signal up from around
-100dBm to consistently better than -60dBm, which is an astoundingly
astronomical improvement in signal strength!

For example, here is a reading, just now, of -53dBm on my cellphone:
http://i.cubeupload.com/GEYEzS.jpg

From what I've read, cellular signal doesn't get much better than that.

However, there is so much data that each of these apps output that I'm
still going through all the useful information to figure out exactly which
device is doing what (since I have an old micro tower and a new femto tower
in my house).