Mobile phone tracking was quietly launched in mainland Great Britain during 2003. Currently it works on T-Mobile, Vodafone, Orange and O2 standard GSM networks and that includes Pay As You Go phones, but other networks such as 3 and Virgin will follow soon, along with support for 3G networks. Surprisingly no extra hardware is required and it will work on any standard handset - even older models - providing you have the permission of the person you want to track.