I'm kinda new here, so hello everyone! I bought four Samsung devices for my family during my last trip in China. Now I'm back to Brazil and I'm having problems trying to set up the phones and the tablet I bought. The devices are: 1) Samsung GT-I9082 Duos (Dual Sim) - I can't update the system (it says there was an error during the updating process) and there's no way I can use Google Play (closes after starts loading). There's only a chinese app for getting new apps that I don't know how to use. 2) Samsung GT-I9105P (S2 Plus) - There's no Google Play on it. 3) Samsung Galaxy Trend Duos GT-S7562 - There's no Google Play on it. 4) Samsung Galaxy Tab2 7.0 - There's no Google Play on it. So, I kindly ask you, how can I format this devices and reinstall their OS like a factory reset? PS: I already tried doing the Factory data reset on both of them but all of them were having the same trouble. What I think is that those are chinese versions, because even when I did the factory data reset there were some chinese apps that were still in there. So what I need to do is to install the lastest android version of each device manually and turn them into a "western" device with google play and all the best android features. Anyone could help me about how to do this? I already looked for it on google and in the forum but none of the situation were the same as mine. Couldn't find a proper "Installing Guide", maybe I didn't look at the right place. Thank you very much! Cya!