So, last night I upgraded my Droid 4 to JB without thinking to do any research on the upgrade, and now, like many other people on this site, I can no longer use FoxFi to create a free wifi hotspot. I've seen other threads recommending a file hack, but I do not understand enough about my phone to follow how that is done. So my question is: does anyone know if it is possible to revert back to ICS once JB is already installed on the phone? Or am I stuck with USB tethering and bluetooth?