Performance
Under the hood, the Note 4 Duos is powered by the Qualcomm Snapdragon 805 chipset, featuring a quad-core 2.7 GHz Krait 450 CPU and an Adreno 420 GPU. This combination was commendable during its release, delivering swift and responsive performance for a variety of tasks. The device originally came with Android 4.4.4 KitKat, but is upgradable to Android 6.0.1 Marshmallow, enhancing its longevity and functionality. Complementing the processor is 3GB of RAM, with 16GB of internal storage, which can be expanded via a dedicated microSDXC slot. This provides users with the flexibility to store more apps and media files without concern for space.