No, I'm not an engineer, but I do know *FOR A FACT* that none of these phones, while tested, were roaming on 850mhz. I also know *FOR A FACT* that nowhere in the greater Seattle area does T-Mobile have 850mhz roaming agreements. T-mobile's home market is 850 free, period (ask any T-Mobile engineer if you'd like, they'll tell you the same).
Now, as for the point of saying that some phones have 850 and some don't, it's irrelevant as far as this review is concerned. I was reviewing RF capabilities on 1900mhz, because that is all I give a **** about. If you care about 850, obviously you wouldn't buy a phone that didn't have it.. you'd be a moron to be on Cingular and not have 850, for example.
But equally, claiming that 850 is neccessary for T-Mobile is simply not true, because *most* of their network is still free of 850 roaming.
In the end though, JP made the claim that *my* comparison was innacurate because some phones have 850 and some don't. My comparison was apples to apples, because all phones were running on 1900mhz. 850mhz in my market means about as much as 2100mhz UMTS.... it's irrelevant.
Next time you want to crap on my review JP maybe you could do it with accurate knowledge.
-olly