AT&T and T-Mobile are the two main providers (in the USA) who provide GSM service. Below are the main cellular bands they use.<\/p>\n
AT&T:
\nGSM: 850 and 1900
\n3G: 850 and 1900<\/p>\n
T-Mobile:
\nGSM 1900
\n3G: 1700 (AWS) and 2100MHz<\/p>\n
GSM bands not supported in the USA, but active in other countries: 900 and 1800. <\/p>\n
Internationally, you may need the 900 and 1800 bands, especially in Europe and Asia (many south American countries work on the 1900 GSM band). If you have a “quad-band” phone it will work everywhere.<\/p>\n
Sometimes these bands are called by acronyms instead of frequencies:
\nUMTS: 2100
\nPCS: 1900
\nDCS: 1800
\nAWS: 1700 (or simply AWS)<\/p>\n
The advanced wireless system is a new block of bandwidth that has been opened up for use in the USA. AWS Overlaps with UMTS and DCS (1700\/1800 and 2100) The convention appears to be labeling AWS with the number 1700, because 1800 and 2100 are already used to indicate other things.<\/p>\n","protected":false},"excerpt":{"rendered":"
AT&T and T-Mobile are the two main providers (in the USA) who provide GSM service. Below are the main cellular bands they use. AT&T: GSM: 850 and 1900 3G: 850 and 1900 T-Mobile: GSM 1900 3G: 1700 (AWS) and 2100MHz … Continue reading