There is a known problem with Sony tabs. If you use a locking code in which two zeros follow each other numerically . You lock yourself out, no version works ! Get the one with two zeros “00”, nor the one with “0” functioned.
If u not create a Sony-account and 2015 u do not need an alternative email address for your Google account. You can chuck away your Tab. Mine has been on the shelf since 5 years
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