AT&T 850 vs. 1900 MHz Coverage Note: These maps were supplied by AT&T in 2008. They no longer support a separate breakout of coverage based on frequency, so any additions will be shown only on their consolidated coverage maps. AT&T has expanded coverage on these bands as well as a number of others. AT&T Current Coverage

Where AT&T uses 1900 MHz Coverage:

Where AT&T uses 850 MHz Coverage:

source: at&t