http://www-support-downloads.sonymobile.com/st26/whitepaper_EN_st26i_xperia_j.pdf
* Memory comprises 650 MB of firmware (using 1.3 GB physical memory to secure against memory
errors), 766 MB of “Phone memory” for downloaded applications, and around 2 GB of “Internal storage”
for music, pictures and movies, and some application data. For a more detailed description of the different
types of memory and how they are used, See “Memory in Android™ phones” on page 17.
Memory
- Internal phone storage: 4GB
- RAM: 512 MB
- Expansion slot: microSD™, up to 32GB
- Flash memory: Up to 4 GB [2]
