First of all check this out for your mobile device (if you have android)
https://play.google.com/store/apps/details?id=com.miner.scrypt&hl=en

From my I-mobile IQ9 I get 2 kh/s that is not much and I see no shares coming in :/

for PC  CPU scrypt mining :
https://bitcointalk.org/index.php?topic=260049.0
or
http://cryptocur.com/litecoin/litecoin-mining/
That will give you the idea

EDIT: 1st share accepted