If you have face problem with samsung glaxy tab3 like pattern lock problem or operating system not working properly or slow speed of tab then you can solve all these problems in few minutes just follow the instructions below.
Note: Keep backup of all data before do that because this will remove all data on tab.
Samsung Glaxy Tab 3 user code unlock
Power off Tab First.
Press and hold Volume Up + Home Button and Power keys together.
Release power button only
When android logo appear select with volume key wipe data factory reset option and press poer button.
Select (Yes...Delete all wipe data) then press power key
When tab formatted press power key to restart tab.
Select language and change other settings with your own requirement.

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