Unless you are using VoIP, all of your voice calls go over the 2G network. | Hacker News

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offmycloud on Oct 27, 2014 | parent | context | favorite | on: T-Mobile quietly hardens part of its U.S. cellular...

Unless you are using VoIP, all of your voice calls go over the 2G network.

kalleboo on Oct 28, 2014 [–]

You're mistaken - 3G/UMTS supports circuit-switched voice calls just fine. It's 4G/LTE that hasn't supported voice calls until very recently when the first networks deployed VoLTE.

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