Wondering if anybody can help with this one. As most of us know, the iOS 6.1.2 update is now available. At work this morning, my colleague who has an iPhone 4 succesfully updated his handset by means of an Over the Air Update (OTA) using his 3G network. Now, when I try and do the same on my iPhone 5, I simply get told that I need to be on a WiFi network, and I can't carry out the update. We both use the same carrier (3), so it's not that. Any ideas why I can't do an OTA update on my handset? Thanks for any help or ideas.