I have the uconnect on my truck and use it daily. It is a great feature.
First you have to have a phone that is bluetooth compatible. Any type of PDA phones like the Palm treo and Blackberry will not work.
Basically you just sync the phone with the Uconnect and set the phone settings desired and it works.
When you set up the phone you can tell it to be discoverable at all times. This will allow the Uconnect to connect every time you start your vehicle.
When a call comes in your phone will ring over your driver side speaker. To answer just press the Uconnect button and you will hear 3 beeps and you are ready to talk. It will auto mute your radio and you hear them through the speaker. When you are done it will hang up as soon as the other person does or you just hit the Uconnect button to hang up.
When making calls you can either use your phone to dial and you will hear it ring over the speaker, or you can press the Uconnect button and say "Dial" and then the number you want it to dial. It will read back the number to you and just follow the prompts.
If you are having a really hard time with it and have a Bluetooth enabled phone PM me and I will send you my phone number and help walk you through all of the functions and set up.