Quad-core ARMv7 processor means a quad-core chip that supports the ARM V7 instruction set. It does not refer to a specific CPU model. It can be confirmed that the CPU of the Mi III is Nvidia Tegra4. NVIDIA's NVIDIA Tegra 4 1.8GHz quad-core uses a 28nm process, has a Cortex-A15 architecture (the first quad-core processor to use the Cortex-A15 architecture), has 72 GPU cores, and specifically supports LTE networks. This is the type of network supported by the soon-to-be-popular 4G network.