Android Update

Connect your phone to an active wireless internet connection. ...
Open your phone's settings. ...
Tap on "About phone" or "About tablet". ...
Tap on "Software Update" or "System Update".
Tap on "Update" or "Check for system updates". ...
Install the update. ...
Wait for the installation to finish.
 
if your tablet dont have new update . You can try this way
unlock bootloader and install Rom cook. You can google search to find android version for galaxy tab.
There are several reasons that Samsung will not give your equipment upgrades to the latest version ( the old model , carrier networks are not supported )
 
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