On another note regarding why some phones do some things, and some
don't do other things. One of the main reasons that phones work in
some world wide markets and not others deal with FCC restrictions in
the US. the 900mhz band is an open band, whereas in the EU and other
areas its designated for cell phone use. the 850 mhz band is devoted
to cell phones in the US. The same is true for the higher frequencies
as well.

So where you are, there may restrictions regarding using what is
considered the UMTS band in the US and other places. It would be
extremely difficult, and time/power consuming for a phone to search all
possible frequencies.

As far as Samsung goes, Samsung creates phones that the carriers want.
All of their phones, except for a few, in the domestic market (US) are
sold locked and branded for a carrier. One of the exceptions is the
SGH-D900. Which is an OpenGSM phone, sold unlocked and nonbranded.

jonfklein@gmail.com wrote:
> Do you know where I can confirm this? For example is there some
> technical documentation or a web page that states the frequency bands
> that the phone operates at?
>
> It seems strange that the operating frequencies for UMTS would not be
> standardized world-wide and why would Cingular/Samsung make a phone
> that would only work in some countries and not others? Why wouldn't
> they make a phone that covered all 1900 bands world wide? So I'd like
> to look into this a bit more before I give up on the Blackjack
> altogether.
>
> -Jonathan
>
> Sir_Dude wrote:
> > I don't believe that the BlackJack includes that particular frequency.
> >
> > It should include UMTS for the 2100mhz band, the highest 1900 band is
> > probably 1910Mhz.
> >
> >
> >
> >
> > 3Gfreak wrote:
> > > This is the only thing I could come up with on their 3G Network and
> > > nothing indicates International
> > >
> > > Cities Supporting Cingular 3GThe Cingular 3G / BroadbandConnect network
> > > is currently available in most major metropolitan areas and is
> > > expanding rapidly. Click on a major metropolitan area below to view
> > > coverage for that area.
> > >
> > > EDGE is Cingular's national high-speed data network available in over
> > > 13,000 cities and towns and along nearly 40,000 miles of highway. All
> > > 3G compatible devices are also EDGE compatible providing the best
> > > combination of speed and coverage. View coverage
> > >
> > > Alabama Birmingham Arkansas Little Rock Arizona Chandler, Gilbert,
> > > Glendale, Mesa, Peoria, Phoenix, Scottsdale, Tempe, Tucson California
> > > Anaheim, Arden-Arcade, Bakersfield, Berkeley, Burbank, Chula Vista,
> > > Concord, Daly City, East Los Angeles, Escondido, Fairfield, Fremont,
> > > Fresno, Glendale, Hayward, Irvine, Long Beach, Los Angeles, Modesto,
> > > Norwalk, Oakland, Oceanside, Ontario, Oxnard, Pasadena, Pomona,
> > > Richmond, Roseville, Sacramento, San Diego, San Francisco, San Jose,
> > > Santa Ana, Santa Clara, Stockton, Sunnyvale, Vallejo Connecticut
> > > Bridgeport, Hartford, New Haven, New London Delaware Wilmington
> > > District of Columbia Washington, DC Florida Cape Canaveral, Clearwater,
> > > Coral Springs, Daytona Beach, Ft. Lauderdale, Gainesville, Hialeah,
> > > Hollywood, Jacksonville, Lakeland, Miami, Miramar, Orlando, Pembroke
> > > Pines, St. Petersburg, Tallahassee, Tampa, West Palm Beach Georgia
> > > Atlanta Illinois Chicago, Elgin, Joliet Indiana Gary, Indianapolis
> > > Kansas Kansas City, Olathe, Overland Park Kentucky Louisville Louisiana
> > > Baton Rouge, Metairie, New Orleans Massachusetts Boston, Cambridge,
> > > Lowell Maryland Baltimore Michigan Clinton, Detroit, Livonia, Sterling
> > > Heights, Warren Missouri Independence, Kansas City, St. Louis Nevada
> > > Henderson, Las Vegas, North Las Vegas, Paradise, Spring Valley, Sunrise
> > > Manor New Jersey Elizabeth, Jersey City, Long Branch, Newark, New
> > > Brunswick, Trenton New Mexico Albuquerque New York New York North
> > > Carolina Cary, Charlotte, Durham, Greensboro, Raleigh, Winston-Salem
> > > Ohio Akron, Cincinnati, Cleveland, Columbus, Toledo Oklahoma Tulsa
> > > Oregon Portland Pennsylvania Allentown, Harrisburg, Northeast-Scranton,
> > > Philadelphia Puerto Rico Bayamon, Carolina, San Juan Rhode Island
> > > Providence South Carloina Columbia Tennessee Knoxville, Memphis,
> > > Nashville Texas Arlington, Austin, Beaumont, Carrollton, Dallas, Fort
> > > Worth, Garland, Grand Prairie, Houston, Irving, Mesquite, Pasadena,
> > > Plano, Richardson, San Antonio Utah Provo, Salt Lake City, West Valley
> > > Virginia Alexandria, Arlington Washington Bellevue, Seattle, Tacoma,
> > > Vancouver
> > >
> > >
> > > 3GFreak
> > > www.mobilevertigo.com
> > >
> > > jonfklein@gmail.com wrote:
> > > > The provided says it is 1922.40 MHz.
> > > >
> > > > 3Gfreak wrote:
> > > > > What is the frequency of their 3G/HSDAP Network?
> > > > >
> > > > > 3GFreak
> > > > > www.mobilevertigo.com
> > > > >
> > > > >
> > > > >
> > > > > jonfklein@gmail.com wrote:
> > > > > > I have an unlocked Samsung Blackjack phone which I have taken overseas
> > > > > > to Africa.
> > > > > >
> > > > > > I have installed a SIM card from a local provider and am using the
> > > > > > phone with this provider's network. I can make phone calls and access
> > > > > > the provider's GPRS system with no problems. However, I am unable to
> > > > > > connect to their UMTS (ie: 3G) system. (The provider does indeed have a
> > > > > > UMTS system installed and functioning.)
> > > > > >
> > > > > > In the header bar at the top of the phone's screen I only get a "G",
> > > > > > indicating GPRS connection capability. I do not get a "3G".
> > > > > >
> > > > > > Any suggestions on how to get this phone to connect to a UMTS system
> > > > > > other then Cingular's would be most appreciated.
> > > > > >
> > > > > > -Jonathan