I think you can say it has an OS, otherwise it wouldn't have all the features it has, like a rotating screen, motion sensors, apps, photo editing. But it's just a nameless LG OS, not Android or Windows or iOS.
OK, I am trying to find out what O/S the LG Cookie KP500 uses, after searching around there seems to be a debate as to IF it uses an OS (this don't help me at all!).
Just need to write something in one of my projects on the operation of the KP500.
(I have a feeling I may struggle to find the OS of the Huawei G7105 as well, havent looked yet).