We bought our 08 JK Sahara in March and as soon as we got it home we realized the uconnect did not work. Turns out for whatever reason there is no microphone. So I did some searching and found out that all you need to buy is a microphone to get the uconnect to work.
So I purchased the microphone, and had it installed in about 30 mins. I couldn't believe how easy it was.
In order for the radio to recognize your voice you will need to go into the diagnostic menu to activate the voice recognition. Do this by pressing the menu and both seek keys at the same time. Scroll down to page 5 and the last option is for the voice recognition.
After the voice recognition is enabled its just a matter of pulling the radio out and plugging the mic into the back of the radio. Once its plugged in, just put everything back together and your good to go. I decided to mount the mike just to the left of the radio on the dash.
Best part is there was no need to go to the dealer for any kind of system update or activation. Once everything was put back together, I was able to pair my phone to the uconnect and make calls. It was that easy! Btw I have the RER radio with nav. Let me know if you have any questions.