WAP is an open international standard for applications that use wireless communication. Its principal application is to enable access to the Internet from a mobile phone or PDA.
A WAP browser is to provide all of the basic services of a computer based web browser but simplified to operate within the restrictions of a mobile phone. WAP is now the protocol used for the majority of the world's mobile internet sites, known as WAP sites. The Japanese i-mode system is currently the only other major competing wireless data protocol.
Mobile internet sites, or WAP sites, are websites written in, or dynamically converted to, WML (Wireless Markup Language) and accessed via the WAP browser.
About ringtones, you can download free ringtones on the PC and then transfer them to your mobile.
There are numerous websites on the net to download mobile ringtones. I have listed a few of them here. you may have to register for some of them. ( registration is free)
http://www-free-ringtones.com/
http://ringtoneworld.blogspot.com/
http://www.pappumobile.com/
http://cellphones.about.com/od/ringtonesmelodies/
http://www.funformobile.com/pages/ringtone/uploadRingtone.php
http://www.wheelerassociates.com/ringtones/download-free-ringtones.html
http://www.mambasearch.com/search.php?tpl=ringtones1&aff=12&saff=7&q=download%20free%20ringtones
http://www.freemobilefun.net/ringtones/
http://www.tonedump.com/
http://www.freeringtonesnow.net/FreeRingtones.htm
http://www.3gforfree.com/index.php
http://free100ringtones.com/
http://www.zedge.net/?p=ringtones
http://www.ringtoneisland.info/
http://www.midicenter.com/
http://www.ringtones4all.com/
http://www.free-ringtones.uk.com/
Be sure to browse around all the websites. You'll definitely find some free stuff you like.