<P> Several categories of methods can be used to find the location of the subscriber . The simple and standard solution is GPS - based LBS . Sony Ericsson's "NearMe" is one such example . It is used to maintain knowledge of the exact location, however can be expensive for the end - user, as they would have to invest in a GPS - equipped handset . GPS is based on the concept of trilateration, a basic geometric principle that allows finding one location if one knows its distance from other, already known locations . </P> <P> A low cost alternative to using location technology to track the player, is to not track at all . This has been referred to as "self - reported positioning". It was used in the mixed reality game called Uncle Roy All Around You in 2003 and considered for use in the Augmented reality games in 2006 . Instead of tracking technologies, players were given a map which they could pan around and subsequently mark their location upon . With the rise of location - based networking, this is more commonly known as a user "check - in". </P> <P> Near LBS (NLBS) involves local - range technologies such as Bluetooth low energy, WLAN, infrared and / or RFID / Near field communication technologies, which are used to match devices to nearby services . This application allows a person to access information based on their surroundings; especially suitable for using inside closed premises, restricted or regional area . Another alternative is an operator - and GPS - independent location service based on access into the deep level telecoms network (SS7). This solution enables accurate and quick determination of geographical coordinates of mobile phone numbers by providing operator - independent location data and works also for handsets that are not GPS - enabled . </P> <P> Many other local positioning systems and indoor positioning systems are available, especially for indoor use . GPS and GSM do not work very well indoors, so other techniques are used, including co-pilot beacon for CDMA networks, Bluetooth, UWB, RFID and Wi - Fi . </P>

Which technology use operator network to give current location details