What's the best approach to get iCloud access on iPhone back after it goes dim?

In Settings: iCloud is dimmed on the phone but the account

is active when you log in to iCloud.com. All seems well there

but on the updated iPhone 4S phone it's a different story.

I've seen the fix to editing restrictions, that wasn't it - then

the one about re-setting the phone - haven't done that as it's

not my phone - but considering it. Is there another angle?