Problem in mobile

Dear friends, i have an samsung monto 3g which have wifi. As i know wifi is high speed internet but i don't know how to use it. Please help me & tell me how to use it because as i heard, wifi on mobile is free of charge.Do i need any programs to use it? How must i connect to the internet by wifi? Its an N95.

Here are the manuals for that phone http://www.phonesir.com/Nokia_N95_manual.html, look at the first link there, under Connections, will tell you how to setup a wifi connection. Of course you need to be somewhere where there is a wifi signal and it's something you can connect to, not a private router.