Memory
Android phones, just like normal computers, use two primary types of memory: RAM and ROM. Although most users are familiar with these concepts, there is some confusion, however, when it comes to mobile devices.
RAM stands for Random Access Memory. It is volatile, which means contents are deleted when the power is removed. RAM is very fast to access and is used primarily for the runtime memory of software applications (including the device's operating system and any applications). In other words, it is used by the system to load and execute the OS and other applications. The number of applications and processes that can be run simultaneously depends on this RAM size.
ROM (commonly referred to as Android ROM) stands for Read-Only Memory. ...
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