Does anyone have a problem with their Iphone constantly asking for icloud login passwords? Everytime I switch my phone off, after logging into Icloud, I am asked to log in again when I next switch on. I have tried signing out of Icloud, deleting the data, rebooting the phone then re-enabling Icould and logging in again but after the next turn off & back on I am prompted again. Its driving my crazy. This doesn't happen on my Ipad or Imac. Help!!