i m new tn android .i just baught an xperia x10i 2.1 .it hasnt installed any android market in it .i need to play hd games like gangster miami. i have a 3g internet connection. i downloaded assasin creed 112mb from pandaapp. i instaled it as the steps were given.instaled its apk file.then copied gamedata to gameloft.disabled wifi. then also not working. i searched on internet they say rooting,upgrading.i dont know whats all this.tell me where,how to downlod.steps to install.iam totaly new to android.help