Instead of 5 GB storage shows 2.42 GB . I 've purchased Karbonn Titanum S5 Plus. In that, It is showing TOTAL STORAGE SHOWING as  (1 GB + 1.42 GB)  ie  2.42 GB But in the features it is written as  1 GB RAM and 4 GB ROM ie Total 5 GB 

INTERNAL STORAGE        1.00 GB

PHONE STORAGE       1.42 GB

Total                  2.42 GB 

OS is Android 2.2 . How to find the RAM size?.  can anyone able to explain this? 

thnx
senthil
Your calculation is based on some misconceptions:

ram is no storage. It's the memory used to run active apps (see our ram tag-wiki for details)
ROM is a misleading term here (and in many other places). What's actually meant in this context ist storage. So these 4 GB is what you're looking for.

Now, storage on Android devices is devided into multiple partitions. Typical partitions are /data for the user data, and the read-only /system partition for the actual OS files. The latter is usually not included in &quot;storage summaries&quot;. I don't know your device, but from the data given can assume:

1 GB &quot;internal SD-Card&quot;
1.42 GB &quot;internal storage (/data)&quot;
remaining storage devided into:

/system: probably about 1 GB
/boot: files for system start
/recovery: for the recovery-menu
and maybe some more small partitions



So there's nothing wrong; specifications have just not been given in a way clearly understandable by the end-user.
Recommendations for further reading:

Android Folder Hierarchy
our file-system tag-wiki
our partition tag-wiki
our storage tag-wiki

And always: Check the links in the &quot;linked&quot; and &quot;related&quot; section of questions, they might (and in most times do) lead to more useful information. Same for the &quot;related&quot; section, and the tags and links (just hover your mouse over a tag to reveal additional information/links).