Since TomTom is made and listed specifically to be compatible for GSM networks only...
Beg to differ, but the TomTom products are not "made ... to be compatible for GSM networks only...". A TomTom unit has absolutely no idea how the signal is being modulated between the phone and the carrier's cell site. The TomTom only cares that the data flows (somehow).
However, I
have noticed that TomTom seems comfortable only with testing GSM equipment. That's a rather Eurocentric approach to life, don't you think? Not everyone here in N.A. is as enamored of that standard (and of the U.S. carriers that employ it) as is the case in Europe, where there's really no choice in the matter. For them, the choice is between GSM and GSM. Consequently, if I gave TomTom a CDMA phone, they'd have no European network to test it against. The problem (as I see it) is that they don't seem willing to do any of their qualification
outside of Europe!
TomTom should consider employing a U.S. test team to take care of North American market needs. (Resume' available upon request).
Yes, it would be probably be nice if the best available standard was being used worldwide for cell phone interconnect (sure would make traveling easier), but I'm afraid we're in a Betamax/VHS situation again. Where bandwidth and battery life are compared carefully, there are clear winners and losers in this business.
Thing is, there's nothing unique about GSM once you've got that data connection, and there's no real reason that TomTom should be qualifying only GSM phones. There's nothing inherent in their product that precludes other modulation schemes. Heck, I'm using their data services over TDMA on my phone -- they've probably never even heard of that one.