Stephen Sprunk wrote:

International roaming is another matter, but most US phones (TDMA, CDMA,
iDEN or 1900MHz GSM) don't work in most other countries anyway.
Tri-band GSM phones are the main exception, and int'l roaming for them
is ridiculously expensive--but at least it works. (CDMA and 1900MHz GSM
are also available in Canada, and that roaming is ridiculously expensive
as well.)

My Motorola V195S was a quad-band GSM.

If you're in another country with a GSM handset, pre-pay and swap SIM cards.
Leave a message in your voice mail with your temporary phone number in
that foreign country, or just return the message left in voice mail if
it can't wait till you return.

International roaming charges would wipe out any profit from that
overseas business trip.