Nowadays, one of the most important applications of the navigation systems are the remote services. Applications such as the remote-fee-collection, truck fleet control or antiheft devices imply millions of users through the roads of the whole world. Particularly in Europe, the development of the GALILEO system and the efforts of the European Parliament in prioritizing the toll collecting systems based on GNSS and cellular networks (GNSS/CN), enlarge highly the european market of potential users. In that million users market, no particular exceptions can be treated by a realistic solution. Most of the actual navigation systems rely mainly on the satellite navigation. Problems susch as the deficit of precision, the lack of coverage or the service interruptions due to disturbances on the satellite network arouse the implementation of a more reliable solution combining GNSS and autonomous navigation systems. This paper is to present how a GNSS/INS integrated system offers the accuracy and quality assurance required in remote services. Both practical and theoretical researches about the possibilities of a single GPS receiver, the EGNOS-SISNet/SBAS position correction improvements, the incoming GALILEO-GPS constellation and the use of a multisensor GNSS/INS integrated solution as a reliable navigation system for remote services applications are presented.