Seriously I have not much idea how they play it. I think I tried in blackjack dot com or io site in here when they had their signature campaign running but lost whatever money I deposited there several times LOL
Although it's not hard, I bet a lot of players play without knowing the whole rules. You can try it for free in TeenPatti Gold (Can find in Google Playstore). There are other apps too but TeenPatti Gold is a good one I have tested till now.
Without knowing the rules will put these players to losing possibilities. Some good tries can be better as you're going to familiarize the game to avoid losing your bets in the long run. Good thing it's now available and downloadable at playstore, it's a fun thing as we're having comfort playing with poker using mobile phone.