Speaking of dual-core or quad-core SoC, these processors can easily execute two or four programs simultaneously. The processors will work less hard to carry out the tasks. As a result, other cores can be used for other tasks. With this, the device's powers will be used more efficiently. If you just want to use medium-intensive apps, such as document viewers, video makers, etc., then a Quad-core processor can handle the tasks. However, for gaming, you should buy a smartphone with Quad-Cores processors.