Displays

• LCD (Liquid Crystal Display): LCD screens are one of the most common types. They use a liquid crystal solution sandwiched between two layers of glass and require a backlight to display images. 

• OLED (Organic Light-Emitting Diode): OLED screens use organic compounds that emit light when an electric current is applied. They offer vibrant colors, deep blacks, and high contrast ratios. 

• AMOLED (Active Matrix Organic Light-Emitting Diode): AMOLED is a specific type of OLED screen that uses an active matrix to control each individual pixel, resulting in better image quality and power efficiency. 

• Super AMOLED: This is a variation of AMOLED technology developed by Samsung. It integrates the touch-sensor layer into the screen, making it thinner and more responsive 

Intergral Parts

These are the parts that come attached to he motherboard .They are mainly utility parts .

• Cameras

• Charging systems

• Power flex cables 

• Volume up/down

• Biometric sensors

• Microphone/speakers

• Chassis and housing

Battery

Batteries can be divided into 2 categories :

Removable Battery : Those that can be easily removed from the smartphone by the user.They were more common in older smartphones but have become increasingly rare in modern devices. Some older models from companies like LG and Samsung featured removable batteries .

Built-in /Non-Removable : These batteries are integrated into the smartphone's chassis and require professionals to replace .Most modern flagship smartphones, including those from Apple, Samsung, Google, and others, feature non-removable batteries.