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RAM: 3GB
ROM: 16GB
Camera Front: 5.0MP

3GB :

RAM shorts for Random-Access Memory, and it is the memory where software resides while it is running, along with the data it is using. Both OS and application software use RAM. RAM is a type of memory that is very fast, but is volatile, meaning all information is lost when electric power is removed. For this reason, it is useful only for temporary storage of data that requires fast access. A device will typically have RAM and some kind non-volatile memory to store a copy of all software and data that needs to be kept the device is powered off or that specific software is not running. Devices with more RAM can run more complex software and/or more applications at one time.

3GB of RAM can be used for high-end-mid smartphones.

Common RAM examples: 512M, 1GB, 2GB, 3GB, 4GB.

16GB :

ROM shorts for Read-only Memory, and it is a kind of memory that stores data long-term. This memory is non-volatile, meaning it keeps data even when the devices is powered off. This memory stores user content, as well as a copy of all software so it can be loaded into RAM when needed. ROM is better known as flash memory. "Read only" is actually a misnomer that has carried over from older devices that had an OS and applications that where generally fixed and therefore stored in truly "read-only" memory. Modern devices use storage memory that easily and frequently changed, but the term has remained.

16GB of ROM is always used for some low end or midrange smartphones that priced between $60 - $100. 

Common ROM examples: 2GB, 8GB, 16GB, 32GB, 64GB, 128GB.