Hide device information pop-up on Galaxy S3 In my Samsung Galaxy S3 (GT-I9300, rooted, SuperUser installed), I have a static pop-up that shows some information about my device hardware and doesn't hide. The pop-up has a background color and yellow text. It has some information like:

PDA:blah
Phone:blah
CSC:blah
and more...




How can I hide the pop-up?
It seems your device is in Factory Mode. To exit from it manually:


Open file manager that can access root folder (e.g. Root Explorer, ES File Explorer)
Go to /efs/FactoryApp/
Open factorymode file as text file. Change the content to ON and save the file
Open keystr file as text file. Change the content to ON and save the file
Reboot the device




Alternatively:


Install Terminal Emulator
Type su
Type (or copy-paste)

rm /efs/FactoryApp/keystr
rm /efs/FactoryApp/factorymode
echo -n ON &gt;&gt; /efs/FactoryApp/keystr
echo -n ON &gt;&gt; /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





You can also exit factory mode and remove the annoying message without root, but it won't fix it:


Go to Settings > Application manager > All
Search Factory Test and "Clear data", "Clear cache"




Reference: ZiDroid - How to Exit Factory Mode for Samsung Galaxy Devices