Starent Networks to Provide Network Mobility Solution for Sprint XOHM™ WiMAX Service

Business Wire, April 1, 2008

LAS VEGAS -- Starent Networks, Corp. (Nasdaq: STAR), a leading provider of infrastructure solutions that enable mobile operators to deliver multimedia services, today announced Sprint will deploy the Starent ST40 multimedia core platform to provide subscriber management and mobility for its XOHM[TM] WiMAX network.

With the XOHM network launch, Sprint will be providing secure, mobile broadband access to the Internet utilizing WiMAX, a fourth-generation (4G) wireless technology. Sprint's aim is to expand Internet access through a new class of devices beyond laptops and cell phones, such as portable media players, video cameras, MP3s and more.

Starent Networks' solutions will play a key role in the network by anchoring the subscriber's connection, enabling roaming throughout the network. Sprint has already announced that ecosystem partners will create multimode devices that will support services on both 4G networks and 3G networks in areas outside of planned 4G coverage. Starent Networks' solutions will provide universal roaming capabilities designed to enable handoffs between a 3G and mobile WiMAX network.

"The Internet is a key part of our daily communications and information exchange," said Atish Gude, SVP Operations for XOHM. "We are working to make the Internet experience available on the go. As a result, we are deploying a 4G network and creating a WiMAX ecosystem to help us successfully do that. We are pleased that Starent Networks is working with us to make the mobile Internet a reality."

"Sprint has long demonstrated a commitment to deploying innovative technologies that increase our ability to communicate," said Ashraf Dahod, CEO of Starent Networks. "One of our roles in the deployment of the XOHM service is to enhance a prominent feature of the network - mobility. We appreciate the opportunity to contribute to the deployment of such an innovative new communications medium that Sprint has taken a leadership role in providing."

About Starent Networks

Starent Networks, Corp. is a leading provider of infrastructure solutions that enable mobile operators to deliver multimedia services to their subscribers. Starent Networks has created solutions that provide mobile operators with the functions and services needed for access, mobility management and call control in their networks. Through integrated intelligence and high performance capabilities, Starent Networks' solutions also enhance subscriber management, billing and session policy enforcement. The company's products are capable of supporting a wide range of mobile wireless networks, such as UMTS, CDMA2000, WiFi, and WiMAX. Starent Networks' products have been deployed by over 65 mobile operators in 25 countries. Additional information about Starent Networks is available at www.starentnetworks.com.

Starent Networks' Safe Harbor Statement

Any statements in this press release about future expectations, plans and prospects for Starent Networks, including statements about expectations related to the company's Mobile WiMAX and multimedia solutions constitute forward-looking statements within the meaning of The Private Securities Litigation Reform Act of 1995. These statements contain the words "believes," "anticipates," "plans," "expects," "will" and similar expressions. Actual results may differ materially from those indicated by such forward-looking statements as a result of various important factors, including the inability to predict the future success or market acceptance of Starent Networks' Mobile WiMAX and other multimedia core platform solutions, the highly competitive and rapidly evolving market in which Starent Networks' competes, Starent Networks' limited operating history, the fluctuation of its past operating results, its reliance on a limited number of customers for a significant portion of its revenues and its reliance on a single line of products and other factors discussed in the "Risk Factors" section in Starent Networks' most recent Annual Report on Form 10-K filed with the Securities and Exchange Commission. In addition, the forward-looking statements included in this press release represent Starent Networks' views as of the date of this press release. Starent Networks anticipates that subsequent events and developments will cause its views to change. However, while Starent Networks may elect to update these forward-looking statements at some point in the future, it specifically disclaims any obligation to do so. These forward-looking statements should not be relied upon as representing Starent Networks' views as of any date subsequent to the date of this press release.

Starent[R] and ST40[TM] are trademarks of Starent Networks, Corp.