Way too much.
it can cost around £20-£30
samsung sucks get iphone 5s
Technically no using wifi is free but paying for the wifi costs money (Apple doesn't charge you but in order to get Internet you will need wifi to go mobile which will cost the owner money.) I use my next door neighbors they don't mind.
Wi-Fi does not cost money. It is free.
If you have the wifi connected, it automatically switches to wifi and turns off the network connection. If it shows the wifi symbol on the top right, you are on wifi. if it shows a "3G" symbol or a "H" symbol in the top right, your connected to the network connection. So no, it doesn't cost anything.
free
no, you just have to have a wi-fi router and Internet
yes trust me i know i tried to get it.
Wifi could cost more than that.
I have Verizon phone service and the droid network is 30 bucks extra a month
to do wifi connections you have to connect to your PCs router, or get a different signal, so no it doesn't cost money unless you're paying for your own internet!