Key to Accelerating Worldwide Availability of Location-Based Services for
                    GPRS/WCDMA (UMTS) Wireless Networks

    SAN JOSE, Calif., Feb. 9 /PRNewswire-FirstCall/ -- Achieving a key
milestone towards the widespread adoption of the Secure User Plane for
Location (SUPL) protocol, NEC Corporation (Nasdaq: NIPNY), NEC Europe Ltd.
and SiRF Technology Holdings, Inc. (Nasdaq: SIRF) today announced the
successful completion of assisted-GPS (A-GPS) interoperability testing in
London on a commercial GPRS/WCDMA network. The success of the
interoperability testing holds the promise of advancing the widespread
adoption of SUPL and enabling mobile operators worldwide to
cost-effectively deliver a wide variety of highly accurate location-based
services.
    The comprehensive testing covered the SUPL protocol as well as network
connectivity, and used mobile phones incorporating SiRF's SUPL version 1.0
compliant SiRFstarIII A-GPS chipset and NEC's SUPL compliant
location-information system. NEC and SiRF Technology are supporting the
SUPL standard to meet the accelerating demand for more accurate,
location-based services worldwide.
    "Interoperability with NEC's location-information system was a seamless
exercise that substantiates the robustness of our implementation of SUPL
standard," said Kanwar Chadha, founder and vice president of marketing at
SiRF. "Commercial availability of NEC-enabled SUPL systems will be welcomed
by operators worldwide as they usher in a new generation of innovative
location-based services."
    SUPL version 1.0, adopted by the Open Mobile Alliance, is a
standards-based protocol that promotes location awareness in mobile
handsets by allowing a mobile handset client and a location server to
communicate position data and requests for position data over the existing
wireless IP network just like mobile internet web pages. Using this
approach, wireless carriers can accelerate their time to market for
launching location enabled services and achieve revenue advantages because
there is little effect on the existing mobile infrastructure and minimal
server installation footprint. Alternate methods for enabling location
awareness in mobile handsets using Control Plane Protocols require
substantial modification to the mobile network infrastructure.
    "NEC is committed to the global success of location-based information
services, and the success of our interoperability testing with A-GPS
chipset leader SiRF Technology ensures the user-plane A-GPS
location-information system can now be reliably deployed by operators,"
said Kiichi Tamida, head of value-added services for NEC in Europe. "In
2001, NEC technology enabled Japan's first commercial user-plane location
information system, and today NEC is providing continual improvements to
mobile operators' location-information services."
    SiRF will be demonstrating the SUPL capability at booth number 1F06 in
Hall 1 at the 3GSM World Congress 2007 being held February 12-15 in
Barcelona, Spain.
    About NEC Corporation
    NEC Corporation (Nasdaq: NIPNY) is one of the world's leading providers
of Internet, broadband network and enterprise business solutions dedicated
to meeting the specialized needs of its diverse and global base of
customers. NEC delivers tailored solutions in the key fields of computer,
networking and electron devices, by integrating its technical strengths in
IT and Networks, and by providing advanced semiconductor solutions through
NEC Electronics Corporation. The NEC Group employs more than 150,000 people
worldwide.
    For additional information, please visit the NEC home page at:
http://www.nec.com.
    * Newsroom: http://www.nec.co.jp/press/en/
    About SiRF Technology Holdings, Inc.
    SiRF Technology Holdings, Inc. (Nasdaq: SIRF) develops and markets
semiconductor and software products that are designed to enable
location-awareness utilizing GPS and other location technologies in three
primary markets: Wireless, Consumer and Automotive. SiRF's SiRFstarIII GPS
chipset allows mobile handset vendors to benefit from ultra low power
consumption, industry leading navigation performance and a tiny circuit
board footprint. Founded in 1995, SiRF is headquartered in San Jose,
Calif., and has sales offices, design centers and research facilities
around the world. Additional information about SiRF and its location
technology solutions can be found at http://www.sirf.com.
    Forward looking statements
    Except for the historical information contained herein, the matters set
forth in this press release, including, but not limited to, statements
regarding the anticipated benefits and capabilities of the adoption of
Secure User Plane for Location (SUPL) protocol and the anticipated
opportunities to those parties involved are forward-looking statements
within the meaning of the Private Securities Litigation Reform Act of 1995.
Words such as "to," "being," "possible," "may," "addresses," "designed to,"
"provide," "believe," "promise," and similar expressions are intended to
identify forward-looking statements. These statements are not guarantees of
future performance and should not be considered as an indication of future
performance. SiRF's actual results could differ materially from those
discussed in these forward-looking statements as a result of risks and
uncertainties, including, among others, demand and market acceptance for
our products and those of our customers, the market for GPS-based location
awareness capabilities, risks associated with the semiconductor industry
and other risks and uncertainties discussed in the Company's Quarterly
Report on Form 10-Q for the quarter ended September 30, 2006 and from time
to time in SiRF's SEC reports. These forward-looking statements speak only
as of the date hereof. We do not undertake any obligation to update
forward-looking statements.