This action cannot be reversed. Scroll to, then tap Backup and reset. Tap Factory data reset. Tap Reset device. Tap Delete all. If unable to reset the device using the above steps, try the alternate master reset method by first powering the device off. When powered off, press and hold the Power key, Volume Up Key, and Home Key at the same time. 1. Make sure that the tablet is actually powered off. 2. Press the "Power" and the "Volume Up" buttons, together, until you see the start-up logo on the screen. 3. Once you can see the logo, release the buttons and allow the device to enter the "System Recovery Mode". Hold down the ‘Power’ and ‘Home’ buttons until you see the Samsung logo to reset a Samsung tablet to factory settings without a password to your android device manager. When you see this, scroll down and select ‘Wipe Data/Factory Reset’ by pressing ‘Volume Down.’. When this option is selected, press ‘Power.’. After I rooted my Samsung Galaxy Tab 3 7" using prerooted.tar.md5, I had the same issue. The screen kept flickering and now I want to unroot to go back to the original manufacturing setting. I just flashed this firmware and it restored to the original condition except the flickering problem still exists. Please help. Press and hold the "Volume Up + Power + Home" combinations until the Galaxy Tab turns off. Release all the buttons. Wait until the recovery screen with the Samsung logo appears. Push the "Volume Up" or "Volume Down" to navigate to the menu. Choose "wipe data/factory reset". In your accounts and synch , please remove all your accounts and then do a factory reset. If this does not work then do a hard reset. Instructions for hard reset. Ensure that the Samsung tablet is powered off. Press the Power and the Volume Up button together till the device displays the start-up logo. Factory Reset Samsung Galaxy Tab Active 3 from Settings. Open Settings on your phone. Scroll down and tap on Backup & Reset. Look for the Factory data reset option and tap on it. Now, tap on the RESET PHONE button and enter your Passcode or PIN. Now, select ERASE EVERYTHING to erase all your data, apps, and settings. As you may already know, a Factory Reset will wipe all of your tablet's data to bring it back to its original factory settings. To learn how to perform a proper Factory Reset on your Samsung Galaxy Tab 2, read through and follow the steps in this great VisiHow guide. Once the reset is done, be sure to log your tablet into a Google account to 9mia3.