I do have an issue though, in that from my own observations that chart is not accurate.
No arguement here, but in some cases it has been right on the money for me. At the same time every phone has different characteristics and some provide better reception than others. My wife's VzW phone is not as good as mine, but mine cost a lot more (me being a gadget geek).
Maybe the guy in the commercials hasn't made it there yet... "Can you hear me now?" :)
BTW... you should update your "roaming capabilities" monthly as cell towers and agreements with other providers change often. For Verizon, when under Verizon coverage (not roaming), dial *228, then press option 2. Wait until it tells "update successful" or something to that effect, then power cycle your phone. This can sometimes provide access to new towers that were recently installed.
For example, Verizon Wireless came to my home town just last year. Until then I was using another provider. Once VzW was here, I had friends from out of town who had VzW and their phone would say "Roaming" while my new VzW phone said "Verizon Wireless". They had to get back into an area that their phone recognized as VzW coverage, then do the *228 before their phone would recognize the new towers in my area.