Update 2 p.m.

DENVER (AP) -- A software glitch at a wireless switching center in Aurora east of Denver interrupted cell phone and text service for about 11 hours in most of Colorado and Wyoming.

Verizon Wireless spokesman Bob Kelley says the problem began at about 2 a.m. Thursday, with service restored at about 1 p.m. Kelley says it appears a software defect, not a virus, caused the outage.

The switch in Aurora handles service for most Wyoming and Colorado, with the exception of the Front Range cities of Colorado Springs, Denver and Fort Collins, which were not affected.

Affected cities in Colorado included Alamosa, Vail, Aspen, Durango and Grand Junction, while affected cities in Wyoming included Laramie, Casper and Cheyenne.

(Copyright 2010 by The Associated Press. All Rights Reserved.)

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Original story

DENVER (AP) -- A software glitch at a wireless switching center in Aurora east of Denver interrupted cell phone and text service in most of Colorado and Wyoming.

Verizon Wireless spokesman Bob Kelley said the problem began at about 2 a.m. Thursday, with crews hoping to have the problem fixed by noon.

The switch in Aurora handles service for most Wyoming and Colorado, with the exception of the Front Range cities of Colorado Springs, Denver and Fort Collins, which were not affected.

Affected cities in Colorado include Alamosa, Vail, Aspen, Durango and Grand Junction, while affected cities in Wyoming include Laramie, Casper and Cheyenne.

Kelley says parts of western Wyoming still have Verizon service.

(Copyright 2010 by The Associated Press. All Rights Reserved.)