This is Kate's jacket. = This jacket belongs to Kate.
That's our neighbors' dog. = That dog belongs to our neighbors.
Belong with means that things/people are similar and should be together. If one person in a romantic relationship says "You belong with me," it is like saying that it is destiny for the two people to be together.
You can also use belong with or belong in for putting an object into a category with other, similar objects:
That book about humans traveling to Mars doesn't belong in the history section. It belongs with the other science fiction books.
An object belongs IN a category, and belongs WITH other similar things.
According to a Stanford University study, that iPhone you ca not keep your hands off of can get more germ infested than a toilet in a subway bathroom.In fact, the glass touchscreens on mobile devices are so good at spreading viruses that sharing them may be almost as bad as sneezing in someone face.Here a scary thought All those germs land right on your cheek and jawline every time you chat away, causing pimples and irritation.To keep your phone (and face) bacteria free, wipe it down with an antibacterial wipe like Clorox Disinfecting Wipes a few times a day.