Mobitel and Sonim Announce Trial of OMA PoC; Mobitel using Sonim's OMA PoC Push To Talk solution for trial.

LJUBLJANA, Slovenia -- Mobitel, the mobile telecommunications operator of Slovenia, with over 1.3 million users, today announced the trial of Open Mobile Alliance (OMA) compliant Push to Talk over Cellular (PoC) services using Sonim's Xtend(TM) PoC Server (XPS).

OMA PoC Push-to-talk features and functionality include:

--1-to-1, 1-to-many ad-hoc group, pre-arranged group, chat group sessions

--List Management on the handset, including contacts, groups and group members, access lists, answer mode and Do-not-Disturb (DnD)

--Contact list with integrated presence/availability

--Network and handset interoperability

"Our customers expressed certain interest for a Push-to-Talk solution to run their businesses more efficiently. We are convinced that network interoperability, dispatch support and the right handset are necessary to enable significant adoption of PTT by customers. Our strategy is to market PTT to our business customers. Sonim's complete end-to-end OMA PoC solution seems perfect for starting our PoC trial." says Domen Rakovec, Chief Development Officer at Mobitel.

"Mobitel Slovenia is globally recognized amongst wireless operators as a leader in successfully bringing to market new services and technologies. Sonim is proud to be Mobitel's solution provider in the first publicly announced OMA PoC trial" says Bob Plaschke, CEO of Sonim. "Sonim's focus on developing an OMA PoC solution with the features and functionality business customers require is a perfect match with Mobitel's plan to provide their business customers with a best-in-class PTT service."

The end-to-end OMA PoC solution is provided by Sonim Technologies, and includes:

--Sonim Xtend(TM) PoC Server (XPS)

--Sonim Xtend(TM) PoC Administrator (XPA)

--Sonim Xtend(TM) Desktop Client (XDC)

--Sonim Xperience(TM) PoC Client (XPC)

--Sonim Xperience(TM) One ruggedized OMA PoC Handset (XP1)

This solution offers additional functionality frequently also asked for by Land Mobile Radio (LMR) users, who can now, at low cost , replace their LMR equipment with XP1-based solutions.

About Mobitel

Mobitel is the leading Slovenian mobile communications operator and one of the technologically most advanced mobile operators in the world. As the only operator in Slovenia with a UMTS license Mobitel launched UMTS network as one of the first operators in December 2003. Mobitel offers various state-of-the-art services and provides a wide range of services using advanced generations of mobile telecommunications GSM 900/1800, GPRS, WLAN and UMTS.

Introduction of the multimedia Planet portal was an important step towards the third generation of mobile telecommunications. The portal offers rich and technically attractive content, and provides users with interesting, useful and entertaining contents and services. The Planet is already used by 60 % of Mobitel GSM/UMTS users, which is one of the highest percentages of multimedia portal usage in the world.

Mobitel represents its own innovative mobile solutions (mobile portal solution - Planet portal, mobile payment solution - Moneta, mobile billing system and mobile voting) at 3GSM World Congress in Barcelona.

For additional information please contact: Katarina Larisa Ham, Head of Public Relation Office, Mobitel d. d., Vilharjeva 23, 1537 Ljubljana, tel. [phone], e-mail: [e-mail]

About Sonim Technologies, Inc.

Sonim Technologies enables today's wireless data networks to deliver high-performance VoIP services. These standards-based solutions provide real-time communication services such as Push-to-Talk that combine the flexibility of mobile messaging with the ease-of-use of voice. The end-to-end, mobile VoIP-based solutions create significant new revenue streams and delivers superior 'return on bandwidth' for mobile operators. Sonim is headquartered in San Mateo, California, with offices in the United Kingdom, Sweden, Spain and India. For more information, visit the company's web site at www.sonimtech.com. For more information, or to schedule an interview with Sonim, contact Jennifer Abelson at 917-445-4454, [e-mail].

Copyright (C) 2006 Sonim Technologies, Inc., Sonim, Sonim Xtend, Sonim Xperience, Sonim XP1, and the Sonim logo are trademarks of Sonim Technologies, Inc. Other company and product names may be trademarks or registered trademarks of the respective owners with which they are associated.