said by elwoodblues:Interesting you say that.. I was at the Grand Canyon last year, and on the top my GSM phone(who ever I was roaming with at the time) didn't work.
However I saw a good number of people chatting away, so I can only assume they were using Verizon and/or a CDMA provider.
It really is 6 of one and half a dozen of the other. I guess the advantage of GSM is that it's used in Europe and Asia. My phone is unlocked so I can swap sim cards very quickly.
My understanding is that CDMA phones cannot be "unlocked"
Was your phone 850 mhz and 1900 mhz GSM?
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