Despite being on automatic update, I found when I checked last night that the update is available if I manually checked (which I did)..... I left the download running overnight as it's close to 1GB in size! Then I updated the phone this morning when I woke. All appears to have gone OK, although some of the colours on apps/functions are different (eg orange on texts) and the lock screen changed to an odd Samsung pattern. Anyone know what the actual differences are?