Wireless Device Location Determination using peer to peer communication:

Hi! I want to develop an application for mobile phones that will enable them to listen to broadcast (uplink) signal by an other mobile phone for the purpose of Location Determination of mobile devices. Can I do this by using CodeWarrior Development Studio for Symbian OS or any other method?? Please help on this ASAP! In case you can, I might be able to collaborate with you to develop this application that may have business prospects. Thank You. Yours Truly, Gaurav Gupta. ar.gaurav.gupta@gmail.com