Earlier today, we were tipped by a really awesome guy about UK carrier Three blocking Cydia servers on their 3G network. The block also affected Cydia in Ireland and China apart from UK. Three is known to block a lot of websites including but not limited to warez and P0rn. Speaking of p0rn, Cydia was also blocked in an effort to filter adult content and not to prevent jailbreakers, which by the way, was accidental.