Dual-core processor in Smartphone: passe. Smartphone quad-core processors: a new standard in mobile performance.
Processor companies such as Nvidia, Intel and AMD have long made use of multi-core design to reduce the dwindling profits in pure clock speed. So, for example, while it may be imprudent or technically it’s not easy for the processor clock of mobile phones in, say, 2 GHz for various reasons, a company can deploy multi-core chip on clock speed is much lower and still give you faster performance (if not also improve power management).
Mobile operating systems and applications must coded to some Core to take advantage of the maximum workload distribution, but as they are, they actually started to sing.