Sonim Technologies and Materna Information & Communications / Vistream Power World's First Standards-Based IP based Push-To-Talk Services in Germany

Sonim Technologies, the leader in Push-To-Talk IMS solutions for
operators and the global provider of high-performance mobile VoIP
applications and devices, today announced that Materna Information &
Communications, a leading telecommunication company, and Materna's
daughter company Vistream, a leading edge Mobile Virtual Network
Enabler (MVNE) in Germany, has selected Sonim's end-to-end solution to
launch the first standard's based Push-To-Talk system. Effective in
mid 2007, Vistream's branded and value-added reseller customers will
have access to Sonim's XP1 mobile "tough phones" as Walkie-Talkies and
can access a high performance Push-to-Talk service.

Sonim hopes to help wireless operators around the world replicate
Nextel's success in the United States by bringing a comprehensive, OMA
standards-based Push-To-Talk system to operators and enterprises in
Germany and Europe. This open approach to integrated mobile VoIP
services utilizing IMS is being embraced by companies and operators
across Europe, most notably by Materna / Vistream, KPN, Telefonica
Moviles and Selectric and Dialect, large value-added resellers in
Germany and Sweden.

"With Sonim's XP1 handset and robust Push-To-Talk service, we
anticipate a strong launch, offering businesses an affordable group
communications system that supports a uniform standard across
different mobile telephones. From Materna / Vistream's point of view,
Sonim is the ideal partner when it comes to supplying these services
to our customers," explains Helmut an de Meulen, CEO and co-founder of
Materna Information & Communications. "Sonim offers a unique
combination of Push-To-Talk applications and equipment, which enables
us to offer the best and most comprehensive communications solution
that is currently available on the market."

"We're breaking ground for OMA Push-To-Talk in Europe and we're
proud to have been an early and aggressive driver of standards-based
IMS services to get us where we are today," said Thomas Hornung, Board
Member of Sonim Technologies. "We're delighted to experience such
momentum in Europe with respected MVNOs / MVNEs like Materna /
Vistream and operators like KPN and Telefonica Moviles. Sonim is in a
unique position to create a unique value in Europe that Nextel
captured in the United States and we're aggressively acting on this
strategy."

About Sonim Technologies Inc.

Sonim Technologies provides solutions that enable today's GPRS,
UMTS, EVDO, WiFi and WiMAX data networks to provide high-performance
VoIP applications and services. These are then optimised in order to
fulfill the productivity targets of mobile companies. Sonim's OM PoC
1.0 Server, client and handset solutions represent the only business
class implementation of push-to-talk standards in the sector and form
the basis of an emerging suite of streaming IMS-compliant
applications. Sonim is based in San Mateo, California and has offices
in Bangalore, London, Stockholm and Madrid. For more information,
please visit the company's website: www.sonimtech.com.

About Materna Information & Communications / Vistream

MATERNA is a leading software provider for information and
communication technologies. The company employs approx. 1400 employees
globally, and obtained sales of Euro 150 Million. In addition to their
headquarters in Dortmund, the company has branches and subsidiaries
all over the Germany as well as in Europe. The business unit
Communications is internationally active in the markets of information
and communications technology. Under the brand "Anny Way" MATERNA
provides service platforms, content premium services as well as voice
and video applications. In addition, MATERNA is successfully
positioned as an MVNE in the market and is an internationally
well-known as a leading provider of fixed network services. MATERNA`s
ability to take difficult and complex challenges for clients has made
the company a sought after partner for mobile communications
providers, service providers and other companies and agencies. The
business unit information realizes integrated IT solutions for process
optimization in corporations and the public sector. This includes IT
Service Management, Customer Service Management, Government Services
and SAP Consulting Services.

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