Since my addiction to this game takes me to the point of wanting to play it on anything, i took the liberty of looking for offline RO based games. As some of you know there is Ragnarok Battle Offline (RBO) and a fighter type game that i dont remember the name at the moment. But i heard once that gravity had a phone game that had RO's Mage, so i started looking and what i found was that it had not only made a game for the Mage but for all other starting first jobs, aco, merch, thief, archer and swordman.
Each of the games have their own story line and main character, also the skill vary a bit, but that's to be expected. The game runs on Java, so most new phones should run it, on the other hand, if you're like me and have a fail phone that doesn't support Java, then you can download MidpX and painfully play the game and wish you had a better phone...
Here is iRO's page about the mobile game
http://iro.ragnarokonline.com/mobile/intro.asp