I am very much impressed with the voice assistant available in Apple iPhone 4S i.e. Siri. The way it communicates and provide answer for our queries or schedule meetings, set reminders or even text friends, that is impressive. I know that Siri needs Internet connection on mobile device to work and it does all the things through cloud. So what I want to know is how much data download or upload happens on average for each communication through Siri. Actually i am using limited 3G Internet plan on my mobile phone and that's why I was thinking whether I should limit myself while talking to Siri as that may drain out my 3G data limit. Also I am looking for a Siri like application for Android phones as my uncle wants that kind of feature in his Android phone Samsung Galaxy S. hope to get some insight on my queries.