The hidden function of Android 4.4 KitKat called Recovery mode, follow our tutorial to learn how to use it. Turn off your tablet. After that press and hold Volume Up + Home button + Power button. Now you will be in expected mode. No rating. Hi, I was able to unlock a Samsung Galaxy Tab A that was locked in MDM mode by postmates. MDM blocked any recovery wiping or download mode flashing, so I couldn't flash TWRP. I was able to set a screen lock (pattern) and turn on "wipe after 15 attempts." To do this, simply press and hold the Power button to bring up the Power menu, then select ‘Power Off’. To enter Download Mode, hold the ‘Volume Up’ and ‘Volume Down’ keys together and connect the tablet to your computer over USB. To enter Recovery Mode, simply hold the Volume Up and Power keys together. Fdz3P3.