Chandra A, Jain S, Qadeer M A [13], has proposed a
location sharing system based on GPS and GPRS using
J2ME, PHP and MySQL which gives the user’s current
location, send this location using SMS and view them on
google map. But the applications they have proposed has
implementation problem, accuracy problem, have no
centralized database as well as some security issue and have
no two way communication between webserver and device.