Samsung Galaxy Note 4 have the metal frame like the Galaxy Alpha but dissembling it doent seem too hard. The metal frame comes off with the back side of the device and brings the antennas with it. On the middle there is motherboard which contains a lot of sensors and chips.
One of the more surprising discoveries from the inside of Samsung Galaxy Note 4 is the confirmation that the 16MP optically stabilized camera uses a Sony IMX240 sensor, rather than using their own 16MP IOSCELL sensor. The camera also has the ambient light sensor and the proximity sensor.
This version of Samsung’s flagship phablet is a dual-SIM, the slot shares an assembly with the microSD card slot. There’s also the traditional Wacom chip for the touchscreen and S Pen handling, an auxiliary Cortex-M4 processor and finally 3GB of RAM stacked on top of the Snapdragon 805 chipset.