Turning both 3G and WiFi off.
Nice one++
However @ milomak
addfree simply adds blocks to your hosts file, nothing more, if the adverts are coming from an unknown provider or ip address it wont work.
You can always track down the ip of the advert(s) in question and manually update your hosts file and/or report it to addfree so that they can include it in their database.
Possibly a stupid question, but you did actually run it, grant the permissions and then download and update your hosts file, its not exactly automatic.