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Do a factory reset.
Mind you, if you do that, I think you'll need to apply a Sony update to the original firmware as the original release was a bit unstable.
Maybe if you look under settings, there is an option to simply deauthenticate it. But check the firmware version. You might want to upgrade it anyway.
Last edited by Rizla; 05-11-2015 at 11:49 AM.
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