You can think of RAM as your pocket and your phone's main storage as your backpack. It's much faster to pull something out of your pocket than it is to pull something out from your backpack.
image: RAMRAM (Random Access Memory) - is the internal memory of the CPU for storing data, program, and program result. It is a read/write memory which stores data until the machine is working.
How RAM works and what it does in your smartphone
When you turn on your phone, and open an app for the first time, your phone pulls the operating system (OS) and app's data from your phone's slower main storage and stores the bulk of that OS and app data in your phone's faster RAM so you can use different elements and features of the OS and app quickly.
When you're finished with the app you're using, your phone keeps the app and whatever you were doing on it in your phone's RAM, even if you switch to another app.
Samsung phones have a well- defined memory management system. It is designed in such a way to utilize more RAM to provide a user-friendly experience.
image: Working of RAMWhen you return to an app you used a while ago, it'll open right where you left off, as if you never even left the app, because it's been stored in your phone's RAM. Essentially, apps you used are kept running in the background while you use other apps.
Switching between apps and picking up right where you left off is often called "Multitasking." If a phone is said to multitask well, it's because it makes good use of RAM or simply has a ton of it.
If a phone didn't have enough RAM, apps would fully close whenever you switch apps. That means apps would need to fully re-open, as if you opened them for the first time after turning on your phone, which causes a delay before you can use the app.
Fun Fact: The first Android phone, the T-Mobile G1, had 192MB of RAM. The Galaxy S20 Ultra has about a gazillion times more-12 GB.
Ideally, a phone with extra physical RAM could use a device driver that enables DMA (Direct Memory Access) for the user interface. This sets aside RAM at boot just for the home screen, touch input, and anything else that makes your phone uber-responsive regardless of anything else running or going on outside of the RAM set aside for DMA. Are you ready for instant touch response or scrolling? Because that is how you get it.
You don't need more, but you can always use more - RAM.
image: RAM in different devices(Smart-phone,PC(Desktop),Laptop)
-Also reffered as main memory, primary memory, or system memory.
