first of all thanks , well actually here while i am in china i can see loads of cheap tablets may be even less than a 100 $ and some of them are a bit goodie etc .But neverthless what i really wanted to know is that if some one was having a chinese tablet ,did they ever get a chance to upgrade from the stock version ? like if the tab was having 2.3.7 ,could we really upgrade it to jellybean 4.1.1?