the reason is simple.. I'm looking at a cheap storage medium for very simple data storage - kind of identification data. Given the fact that mobile phones have invaded the earth, sim card is the most easily available form of storage to anyone. Also i see a trend where mobile companies are throwing them at consumers for free hoping they woud make money later 
so was hoping to try and use it in a simple fashion.
Reading code is out of question right now (i'm still a starter for that kind of work)