Talk:United States/@comment-24682153-20181114131833/@comment-24682153-20181122204706

When it's specified like this 1700/2100 MHz, they are working in the US on band 4. 1700 MHz is in effect 1700 MHz band for upload and 2100 for download and is also called AWS or band 4. We don't call it "1700/2100" here as it can be easily mixed up with 2100 MHz that is the most widespread 3G band in the world. A 2100 MHz device doesn't work on 1700/2100 MHz or band 4 or AWS as long as it's not specified like this. But a 3G 1700/2100 MHz will work in the US where there is still some AWS 3G left. T-Mobile US was almost the only provider that used this band for 3G.