My problem is I need a candy bar style Nokia GSM to replace my TDMA hardwired 6360 mounted in a helicopter. All my research so far has led me to an unlocked 6230 (foreign because AT&T discontinued it), a CK-7w car kit and a MBC-155-AC holder. Does anybody see any problem with this working on my North America service with AT&T? Never bought out of country phone before. Any advice on a different model phone would be appreciated too, thanks.