There are three types of microwave ovens: Solo microwave oven, Grill microwave oven, and Convection microwave oven. Solo microwaves are considered basic or initial level or entry-level. Grill microwaves are considered the next as a step above solo microwave oven. And Convection microwaves are at the top and it is the advanced type. The main difference between the three is the included features, power consumption watts, and price range according to the functionality. Common microwave problems and faults and the way to repair them. Samsung Service Center