AT&T is firing up its mobile 5G network in parts of a dozen U.S. cities this week, making it the first carrier to do so. But as with many firsts in the early stages of the 5G arms race, the announcement comes with some caveats.
The company said today that its 5G service would be available starting later this week. That’s technically in keeping with its promise to go live by the end of this year, but because 5G-compatible phones won’t hit
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