My Samsung Galaxy S3 (SGH-T999 version for T-Mobile) is stuck in factory mode. I have followed the following instructions I found elsewhere on this forum but no luck. The instructions I found were as follows:
"1. ud have to install a terminal emulator from google market
2. Type su
3. Then enter the following after the #
echo -n ON > /efs/FactoryApp/factorymode
(yes ON is the correct setting to turn it off)
Then I had to reboot for the change to take effect."
I've followed these instructions to the letter by typing everything exactly as shown here, pressing enter at the end of each step/text entry. I've also input the text with no spaces, and all together without pressing enter until all the text is entered, and any other way I could type it into the terminal emulator. The problem with these instructions is that the poster did not give what keys he pushed for each step. Maybe I'm a bit dense but it doesn't make sense to me.