samsung galaxy tab2 10.1 harde reset

warning! Do this at your own risk! All your phone data (contacts,photos,videos,music,messages,a­pplications,games,files,) will be lost! Please make backup first if you can
.If you forgot your screen lock combination follow these steps

* Power off your tablette 
* Press together volume up + power button 
* Release your fingers of the tablette when Samsung logo appear
* Choose with volume buttons "wipe data/factory reset" and select it with powre button
* Choose "yes" with volume buttons and select it with power button
* Wait untiil format is complete 
* Select "reboot system now"
* wait untill tablette restarts