Abstract. The new wireless technologies for telecommunications networks and devices will enable new kinds of mobile services [7] and create enormous business opportunities [2]. Effective use of these business opportunities requires cooperation with other companies and using applications developed by third parties. The teleoperators today have a dominant position across all markets, and third parties can only provide applications. The third party service development is limited today both by technical and business constraints that make the effective use of third party applications difficult. This paper handles the development of wireless service and proposed use of open standards (like OMA and OSA) and interfaces as one solution to more effective use of third party applications. The wireless Internet service development is illustrated with the aid of a wireless pilot service that is under development for the third generation wireless networks.