Currently Being ModeratedOct 24, 2013 1:07 PM (in response to Muffin0)
Go to Settings>iCloud>Account>Keychain (at the bottom), tap the number shown then enter the correct number.
Currently Being ModeratedOct 25, 2013 9:12 AM (in response to randers4)
That is not working, because you don't get the first security code and then you are stuck. I mistyped my number and send it by mistake and now there seems to be no way to change it. I can't see the number in the settings.
Currently Being ModeratedOct 25, 2013 9:18 AM (in response to Dany.Vey)
See if this helps: http://support.apple.com/kb/HT5834.