if you are looking into an apple iphone, look at apple.com at the very top right they have a support section that you can ask and revieve feedback from regular people in an online forum. To answer your question approx. 7.5 GB usable storage, the rest is used in core information. Hope it helps!
Chat with our AI personalities
The original iPhone and iPhone 3G have 8 GB (gigabytes) or 16 GB of flash memory for permanent storage of songs, videos, apps, pictures, operating system files, etc. This flash memory is similar to the hard disk space on your PC, or the space available on a USB flash disk and cannot be used as the computational RAM (random access memory) needed to run the operating system and applications. The iPhone and iPhone 3G have 128 MB (megabytes) of RAM used by the OS and applications in order to run. The processor in the original iPhone models runs at 412 MHz (megahertz).
The iPhone 3G S, released in June of 2009, has 8, 16 or 32 GB of flash memory and 256 MB of RAM. The new 3G S processor runs at 600 MHz.
If each photo was a 10 Mb photo then you could hold 800 photos, if they were taken with the iPhone and each was 2 Mb then you could have 4,000 photos.
An 8GB iPhone actually will only hold about 6GB of the 8GB available. However, that is more than enough space for most users.