19-Dec-2005 - Major US Carrier Selects Evolving Systems' Local Number Portability Solution

ENGLEWOOD, Colorado, December 19, 2005 - Evolving Systems, Inc. (NASDAQ-EVOL), a leading provider of software solutions and services to the wireless, wireline and IP carrier markets, today announced that another major US carrier has selected Evolving Systems' Local Number Portability (LNP) solution.

The customer, a major wireline carrier, chose the Order Path SOA and PortExchange™ ICP products. Evolving Systems was selected as having the most cost effective and feature-rich solution of those evaluated in a competitive bid process. The solution is expected to go live in March 2006.

"This latest customer joins a stream of new clients - cable companies, ILECs, large and small wireline and wireless carriers - that have chosen our number portability and other numbering solutions products this year,' stated Stephen Gartside, president and chief executive officer of Evolving Systems. 'We continue to demonstrate that we can our grow market share in number portability and other numbering solutions, both domestically and internationally, against the competition.'

About the OrderPath Product
The OrderPath product is a leading inter-carrier ordering gateway, proven to support major carriers' data exchange requirements. It isolates and manages critical data exchanges, enabling other OSS and BSS systems to focus on their primary functions. It is backed by 20 years of OSS development at Evolving Systems. The result is a high quality system that provides quick, effective upgrades and high levels of performance, reliability and availability.

Additionally, OrderPath provides an ENUM module that supports the ENUM registration process for provisioning of end user services (for ITU E.164 complaint numbers). The ENUM protocol enables access to internet-based communications using a single telephone number. This allows Evolving Systems' customers to link multiple communications services to a telephone number, providing a single point of contact for services such as email, instant messaging and Voice over IP (VoIP).

The PortExchange Software supports a carrier's wireless basic and complex port-in and port-out processes.

About Evolving Systems®
Evolving Systems, Inc. (NASDAQ-EVOL) is a provider of software and services to more than 50 network operators in 40 countries worldwide. Its portfolio includes market-leading products for Activation, Mediation and Numbering Solutions. Founded in 1985, the Company has headquarters in Englewood, Colorado, with offices in the United States, United Kingdom, Germany, India and Malaysia. Further information at www.evolving.com

CAUTIONARY STATEMENT
This news release contains "forward-looking statements" within the meaning of the United States' Private Securities Litigation Reform Act of 1995, based on current expectations, estimates and projections that are subject to risk. Specifically, Evolving Systems' statements about the impact of the products and contracts described in this press release are forward-looking statements. Readers should not place undue reliance on these forward-looking statements, and the Company may not undertake to update these forward-looking statements. Actual results could differ materially because of many factors, such as internal budgeting changes of customers; the impact of competition and the general state of the telecommunications industry. For a more extensive discussion of Evolving Systems' business, please refer to the Company's Form 10-K filed with the U.S. SEC on March 31, 2005.

CONTACTS:
Investor Relations
Jay Pfeiffer
Pfeiffer High Investor Relations, Inc.
303.393.7044
jay@pfeifferhigh.com

Public Relations (EMEA & Asia Pacific)
Jenny Dutta
Ogilvy Public Relations Worldwide
+44 20 7309 1217
jenny.dutta@uk.ogilvypr.com

Public Relations Contact (Americas)
Dan La Russo
Ogilvy Public Relations Worldwide
212.880.5315
dan.larusso@ogilvypr.com

Evolving Systems is a registered trademark of Evolving Systems, Inc.

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