hack to change ur modem's mac address

download a small exe file whichis executed on dos prompt
http://ntsecurity.nu/toolbox/etherchange/

goto run
type the following commands and press enter each time
cmd
ipconfig /all

ur will be able to see a physicall address or a mac address

now click on the icon (exe file which is downloaded)
follow simple instructions
follow give a different mac address
and change it
to unchange it simply disable the internet connection /modem and again enable it

enjoy..........
so hackers its enough stop doing it ..........