[garyflynn]

So there are 9 radios available now?

I have not seen a good explanation of what one radio does that another does not in theory. You'd think if one radio had a better algorithm for connecting to one kind of tower while another had a better algorithm to connect to another kind of tower, or under another set of circumstances, it would be possible to predict which radio would work best beforehand, and even make a custom radio that takes the best elements of whatever radio is available.

I wouldn't be shocked if there is bit-by-bit, no difference between radios.