Alaska Communications Systems Announces Partnership with OnStar.

ANCHORAGE, Alaska -- Alaska Communications Systems Group, Inc. ("ACS") (NASDAQ:ALSK), Alaska's leading integrated communications provider, today announced it has been chosen as the underlying provider of wireless services that enable OnStar's capabilities in Alaska. OnStar Hands-Free Calling allows customers to make and receive calls in their vehicle at the touch of one button.

"We live in the largest state in the union and because so much of our travel is by road, it's critical that our customers stay safe and connected," said ACS president and chief executive officer, Liane Pelletier. "Leveraging our advanced CDMA network, this relationship with OnStar is another way of ensuring that Alaskans have access to safety and security through ACS.

"At ACS we constantly work to enhance our services to ensure our customers can make and receive calls wherever their lifestyle takes them. That's why our network offers the best voice quality, fewer dropped calls and the best roaming coverage," added Pelletier.

About Alaska Communications Systems

ACS is the leading integrated communications provider in Alaska, offering local telephone service, wireless, long distance, data, and Internet services to business and residential customers throughout Alaska. More information can be found on the company's website at www.acsalaska.com or at its investor site at www.alsk.com.

About OnStar by GM

OnStar, a wholly owned subsidiary of General Motors, is the nation's leading provider of in-vehicle safety, security and communication services using wireless technology and the Global Positioning System (GPS) satellite network. OnStar is available on more than 50 GM models for 2005. Over the next several years, OnStar Service will become a standard feature for one year for GM's retail customers in the United States and Canada, covering all segments and prices except for some commercial vehicles. OnStar safety and security services include automatic notification of air bag deployment, stolen vehicle location assistance, emergency services, roadside assistance, remote door unlock, and GM Goodwrench remote vehicle diagnostics. OnStar Hands-Free Calling allows drivers to make and receive hands-free, voice-activated calls from their vehicle. Hands free calling requires a Hands Free Calling Enabled Vehicle, existing OnStar service contract and prepaid calling minutes. More information about OnStar can be found at www.onstar.com.

Safe Harbor Statement

Statements about future results and other expectations constitute forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. These statements are based on current expectations and the current economic environment. The company cautions that these statements are not guarantees of future performance. Actual results may differ materially from those expressed or implied in the forward-looking statements. A number of factors in addition to those discussed herein could cause actual results to differ materially from expectations. The company's financial planning is affected by business and economic conditions and changes in customer order patterns. Any projections are inherently subject to significant economic and competitive uncertainties and contingencies, many of which are beyond the control of ACS. Important assumptions and other important factors, including risk factors, which could cause actual results to differ materially from those in the forward-looking statements, are specified in the company's Form 10-K for the year ended December 31, 2004 and other filings with the SEC. The company undertakes no obligation to update forward-looking statements, whether as a result of new information, future events, or otherwise.