Vodafone reported that its telephone network reached the most it could at about 10am on the day of the bombings, and it was forced to start emergency plans to put emergency calls first. Other phone networks also said they had problems. The BBC thought that the telephone system may have been shut down by security services to prevent the possibility of mobile phones being used to trigger bombs. This opinion was considered, but it was later found out it was due to a higher amount of texts and calls being made by people. ACCOLC was activated only in a area around Aldgate Tube Station because key emergency personnel did not have mobile phones with ACCOLC. The failures of communication when the emergency was happening caused discussion about how to make London's emergency communications system better.