RAM and ROM are two types of memory used in mobile phones. RAM stands for Random Access Memory, and it is a type of volatile memory that stores data temporarily. It is used to store the data that has to be currently processed by the CPU temporarily. RAM is much faster than other types of memory, such as hard disk drives, making it ideal for storing and accessing data that needs to be accessed quickly. On the other hand, ROM stands for Read Only Memory, and it is a type of non-volatile memory that stores data permanently. It is used to store firmware or microcode, which is used to initialize and control hardware components of the computer. ROM is much slower than RAM, and it is much less flexible. It is generally used in embedded parts, where the programming requires almost no changes. ROM is a memory chip fixed on the motherboard at the time of manufacturing. It is a permanent, non-erasable memory that gets initiated when the power is supplied to the computer. In summary, RAM is used for temporary storage, while ROM is used for permanent storage of data and instructions.