TSI Launches International Interstandard Data Services.

Business Editors

CTIA Wireless IT and Entertainment 2003

LAS VEGAS--(BUSINESS WIRE)--Oct. 22, 2003

TSI Telecommunication Services Inc.:

-- News Summary: TSI launches Interstandard Data Services

solution that enables international data roaming to more than

140 countries. The service gives wireless subscribers the

ability to access the Internet and experience worldwide data

usage with no calling cards or credit cards.

Mobile operators can now offer subscribers worldwide data usage with the introduction of TSI's Interstandard Data Services (IDS) solution, launched today at CTIA I.T. and Entertainment 2003 by TSI Telecommunication Services Inc. (TSI) (www.tsiconnections.com), a global communications technology company. TSI's IDS solution allows travelers to use international GPRS data services and have their international usage charges appear on their home operator bill in their home currency. The service includes signal conversion for validation and authentication, as well as IP packet routing and billing record conversion between GSM GPRS and CDMA2000 communication networks. The service supports dual-mode voice and data handsets as well as PC cards.

IDS bridges the gaps between different cellular network protocols -- 1XRTT used in CDMA networks and GPRS used in GSM markets. The required technical interoperability is transparent to the user, including Cellular Industry Billing Exchange Record and Transfer Account Procedure (CIBER-to-TAP) billing conversions and currency translation management for international settlements.

"IDS can be fully integrated with TSI's UniRoam(SM) interstandard voice roaming solution, allowing an international traveler the ability to access both GSM voice and GSM GPRS services," said Michael O'Brien, TSI vice president-marketing. "This gives mobile operators the flexibility and technical capability to offer their subscribers multiple services under one account. Another attractive feature of our service is the ability to select your own roaming partner and negotiate your own roaming rates to offer your customers a high-end service at a reasonable cost."

TSI's IDS solution provides the network signaling conversion for the home operator's network to talk to the visited network via a single connection to TSI's interstandard data roaming platform. Each operator must form a GSM GPRS roaming agreement with a roaming sponsor operator to enable subscribers to use the coverage area with a GPRS handset or PC card. The subscriber's temporarily assigned IMSI and home MIN/ESN are entered in a database to enable the mapping necessary for mobility management, including validation, data delivery and billing. TSI acts as a clearinghouse for the international partners. All billing between the sponsor operator and home operator uses either the CIBER standard billing format or the TAP standard billing format. TSI's interstandard roaming solution will convert the billing records into the preferred home billing format, either CIBER or TAP, and automatically convert the currency into U.S. dollars for CIBER, or Special Drawing Rights (SDRs) for TAP. All data roaming charges are settled between the home and sponsor operator. All billing charges then appear on the subscriber's home wireless bill.

About TSI

TSI Telecommunication Services Inc. (TSI) is a global communications technology company specializing in innovative business and network engineering solutions that manage and interconnect voice and data systems in 30 countries throughout North America, Central and Latin America, Asia Pacific and Europe. TSI provides technology interoperability, network services and call processing to more than 275 mobile operators, wireline carriers, emerging telecom market entrants and business customers. Products include SS7 intelligent network solutions, clearing and settlement services, voice and data roaming facilitation, fraud management, revenue enhancement solutions and more than 25 other integrated services. TSI is a privately owned corporation headquartered in Tampa, Fla., U.S.A., with offices in major cities throughout the United States and offices in The Netherlands, London, Luxembourg, Beijing and Hong Kong. For more information, visit www.tsiconnections.com.

CUSIP: 87287VAB8 Bloomberg Tickers: TSITEL (Bond) 32497Z (Equity)

Cautions about Forward Looking Statements

This press release contains "forward-looking statements" within the meaning of the Private Securities Litigation Reform Act of 1995. These include, but are not limited to, statements regarding the TSI's plans, intentions and expectations. Such statements are inherently subject to a variety of risks and uncertainties that could cause actual results to differ materially from those projected. Given these concerns, investors and analysts should not place undue reliance on forward-looking statements.