contract you make when you join one of the broadband
providers or mobile
broadband providers varies from provider to provider. Most providers
require a 12 month broadband subscription to their service although
is this isn't what you want then you can get it so you only pay
monthly and can end the contract at anytime.
most of the larger broadband providers now offer free connection
and free broadband modems/routers it would not be financially possible
for them to do this if they were only going to keep a customers
custom for just 1 month.
here about how to cancel