<P> A 2005 television advertisement for the mobile telephony provider O2 promoted a service that allows a user to select two area codes they can call for a reduced price; it also incorrectly showed 0207 and 0208 as different "area codes". </P> <P> Outside London, in the areas that had newly assigned 011x codes in the 1990s, many mistakenly believed that the added digit necessary to lengthen the subscriber number to seven digits was part of their new area code, largely because these places originally had traditional area codes (being non-Director areas), and as a result, many misquoted their numbers in the 011xx xxxxxx format, rather than in the correct 011x xxx xxxx format . In Reading, the confusion was furthered by the fact that dual running of the original 01734 and new 0118 codes was possible during the migration period, so it was possible to continue dialling the number locally in the six - digit format until 1998, when seven - digit numbers became mandatory . Because of this, many mistook the added 9 as being part of the new area code, rather than the subscriber number . Following the migration, new numbers beginning with 3xx, 4xx, 91x and 90x began to be issued . </P> <P> Confusion is also caused by exchange automated changed number announcements where the voice synthesiser assumes that all area codes have four digits and places the spoken pause incorrectly . </P> <P> From June 2005 new local numbers in London with an initial "3" like (020) 3222 1234 began to be allocated . Owing to the lingering confusion, people unaware of the correct format are beginning to assume erroneously that there is now a new London code, "0203". Even some local and national newspapers have given this misinformation . Some people report mis - dialling of London 3xxx xxxx numbers, where callers are dialling 0207 in front of the local number part instead of just 020 . This call connects to (020) 73xx xxxx (ignoring the final digit) instead of to the expected number . </P>

(co 7) which of the following facts about telephone numbers is not correct