O2 certainly had an adult filter on their 3G data by default in 2011[1]. It was very annoying because it was so indiscriminate - anything that could be used as

O2 certainly had an adult filter on their 3G data by default in 2011[1]. It was very annoying because it was so indiscriminate - anything that could be used as a proxy was blocked (like Google Translate) for instance. Turning it off required giving them your drivers licence number as I recall. [1]http://www.wired.co.uk/news/archive/2011-03/04/o2-mobile-web-filtering http://www.wired.co.uk/news/archive/2011-03/04/o2-mobile-web...