I was under the impression that GSM phones support multiple frequency bands - wh... | Hacker News

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bdonlan on March 21, 2011 | parent | context | favorite | on: In AT&T & T-Mobile Merger, Everybody Loses

I was under the impression that GSM phones support multiple frequency bands - why not just adjust the base station configuration so phones can roam between the two networks?

pantsd on March 21, 2011 [–]

The 3G bands used by T-Mobile and AT&T are different and generally not supported on the same device. For example there was a T-Mobile version of the N1 and an AT&T version of the N1. They both work on the others 2G network, but not on the 3G network.

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