Chipset is an array of integrated circuits meant to perform in real-time constraints and dedicated functions. Expensive smartphones tend to have better chipset, which performs more advanced operations.
Qualcomm MSM8996 Snapdragon 821
It stands for a Central Processing Unit. It's generally known as the brain of the device. In short, the CPU process the lines of tasks assigned by the operator.
Quad-core (2x2.15 GHz Kryo & 2x1.6 GHz Kryo)
The Term GPU stands for the graphics processing unit. It is a single-chip processor meant to boost up object alteration, image production, and 3D Motion by manipulating the memory.
ARM Mali-T860 MP2
Random Access Memory
3 GB RAM
4 GB RAM
4x 1.5 GHz ARM Cortex-A53 4x 1.0 GHz ARM Cortex-A53
It's a reserved memory in Smartphones, laptops, tablets, e.t.c, allowing to save all the data pertaining to the applications, videos, images, and other files in one place.
32 GB/64 GB
It's an alternative external memory to extend the storage size by means of MicroSD card, flash e.t.c
Up to 2 TB
up to 256 GB (dedicated slot)
It's a medium or location putting the memory card.
Fingerprint (rear), proximity, Accelerometer, compass
accelerometer, Fingerprint (rear-mounted), Hall IC, Ambient light sensor, compass, proximity, barometer.