Wireless providers' switch from analog to digital leaves many OnStar,
security customers disconnected
<http://www.dallasnews.com/sharedcontent/dws/bus/stories/DN-onstar_23bus.ART.State.Edition1.2a4dbb8.html>

The network that launched the U.S. wireless industry with brick-size
-- and brick-heavy -- cellphones 24 years ago will switch off in most
of the country next year, leaving a surprising number of users in the
lurch.

...

Verizon Wireless, AT&T Inc. and Alltel Corp. are the largest carriers
that still have analog networks. Alltel will take more time than
Verizon and AT&T to close its network, shutting down in three stages
ending in September.

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