SARY KH

If your device display a annoying transparency black background which contains some info about your device (PDA, Phone, CSC, H/W, Camera, …) in yellow text … and lock screen is not working, mean that your device is in factory mode.
“Factory Mode” is enabled if the EFS partition is corrupted because of installing custom ROMs, bad Mods or downgrading your current system version or after you succeeded in fixing the EFS partition.

Requirements :

• Rooted Samsung galaxy device
• Installed root file explorer (ex : Root Explorer or ES File Explorer)

Steps :

1. Open “ES File Explorer” and press on the top left icon
2. Go to Tools and turn on “Root Explorer”
3. Go to Local > / Device > efs > FactoryApp and open factorymode as text in “ES Note Editor”
4. Change it from OFF to ON and save it
5. Open keystr as text in “ES Note Editor”, change it from OFF to ON and save it
6. Reboot

Or :

1. Install “Terminal Emulator“
2. Type : su
3. Type :

1.  rm /efs/FactoryApp/keystr
rm /efs/FactoryApp/factorymode
echo -n ON >> /efs/FactoryApp/keystr
echo -n ON >> /efs/FactoryApp/factorymode
chown 1000.1000 /efs/FactoryApp/keystr
chown 1000.1000 /efs/FactoryApp/factorymode
chmod 0744 /efs/FactoryApp/keystr
chmod 0744 /efs/FactoryApp/factorymode
reboot
2. You can also exit factory mode and remove the annoying message without root, but it won’t fix it :
3. Go to Settings > Application manager > All
4. Search Factory Test and “Clear data”, “Clear