Yes. It is primarily used with Prepositional. There is only one use of о/об with Accusative, the one of coming into physical contact (by hitting, rubbing, leaning, stumbling, getting your clothes caught on something sticking out):
- Я споткнулся об камень. = I stumbled upon a stone.
- Я поранил руку, ударившись о стенку контейнера. = I wounded my arm, having bumped into a wall of the container. (partiticples, physical contact, verbs we do not have in the course —pretty advanced stuff here :))