Cannot get Android Apps

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http://androidforums.com – Hey, so I just bought a sony erricsson xperia, in China. When I brought it home I noticed that it does not have the android app market/ google plus store. I have tried to find and download these it off of the internet but it will not let me. I have application installer, but when I go into it it says No supported files. I'm struggerling here and any addvice on how to sort this out would be appreciated. Cheers (General)