I am not completely aware of all of this but as far as i know that if u have a wap site..........
one with .wml pages assecible by mob browsers
u can use java in that which can have connection back to php
so u need knowledge on
1:Php
2:MYsql
3:Javascripts
4:Wml(Xml version 1.1)
To make this application
..................
and yes a gprs enabled cell phone with a wap browser
...................
there is simpler way too...
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But i dont know them
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Paagle
TEAM LEADER-Team Xuberance(
http://www.xuberance.com)