I just picked up the most recent, Jelly Bean, Razr Maxx, and the Foxfi won't work. It keeps coming up with the message: Fail to activate hotspot: Fail to enable Hotspot. Please try again. If your phone is a supported model please also try rebooting first.
The phone seems to be supported so I don't get it. I have a 'pin' set up on the lock screen. I use this a lot so this is a big issue.
Not as far as I know as people on 4.3 seem to be able to use it. You may want to check the PDANet site to be certain you have the most recent build. I have 4.12.6 of PDANet
Are you using the Razr Maxx or the new Droid Maxx. All of the newer phones running 4.2.2 such as the Ultra, Maxx, LG G2, etc. cannot use Foxfi as far as I know. Scan those forums and you'll see all of the complaints.