Originally Posted by sureloch
I don't believe that will work as the 2100 radio is set up for AWS.
American AWS UMTS phone radios are set up to transmit signal in "2100" (2110-2155)Mhz range and receive signal in the "1700" (1710-1755)MHz range.
While EU UMTS "2100" phone radios are set up to receive signal in "2100"(2110-2170)Mhz, and transmit signal in "1900" (1920-1980)MHz range.
You have got it backwards. Both AWS and EU 2100 UMTS use 2100 MHz for download; they just use different frequencies for upload. See the table here: http://en.wikipedia.org/wiki/UMTS_frequency_bands
The more recent posts are correct. The facts are these:
1. When a phone's specs list "UMTS xxxx" (850, 900, 1700, 1900, 2100, etc.) it generally isn't a listing of the exact frequecies, but rather the 3G "bands" that are supported. Thus a European phone that lists "UMTS 900/2100" actually supports 3G downloads in the 1920-1980 MHz range, since that is part of Band I or "UMTS 2100".
2. The WHOLE POINT of AWS in North America is to make it super-easy for manufacturers to support the European and Asian UMTS 2100, by using largely overlapping download frequencies. PhoneScoop has a good article on this: http://www.phonescoop.com/articles/a...hp?a=99&p=1493
. For this reason, you will rarely or never see an AWS phone that doesn't also support 3G in Europe.
3. Even if surelock and others were correct in their mistaken info that AWS transmits on 2100, that wouldn't make it impossible to support both. Many "3G world phones" for AT&T and Rogers support UMTS 850/1900/2100. 1900 is the PCS band, and it receives on 1930-1990, while Band I (or 2100) transmits on 1920-1980, which overlaps. These phones have radios that can switch between transmitting and receiving on overlapping frequencies. You'll just rarely see these two types of networks operating on the same continent.
The Dell Venue Pro supports one North American 3G band (UMTS 1700 or "AWS") and two European/Asian 3G bands (UMTS 900 and UMTS 2100).