iPhone 4 won't rotate screen horizontally
This is a model MD128LL/A, obtained at an AT&T store as a trade-in, but I hear this is an "unlocked" phone. iOS is 7.04.
Anyway, at the upper right of the screen there is the portrait orientation lock icon. Page 33 of the user guide says:
Of course I want to unlock, but in any case, after the double-click and flick, I get:
There is no rotation icon (the one in the second sentence). What am I missing here?