I could not get my JB to work with my 8120 for the life of me. It worked fine with my 8100, but not the 8120. I read on the Jawbone support site where someone was having a problem with their JB and their UMA version of the 8300 and support recommended not using the wifi while trying to use the JB. This morning I cleared the phone and reset the JB and then pared them up while keeping the wifi off. It worked finally! I'm trying to use it all day today while not having the Wifi on to see what happens. I'm not sure if it had to do with pairing it with wifi off or just using it wifi on, but it's working with wifi off.

I'm happy. Don't need to go buy another JB when this one worked perfectly before.