How to sync your iPhone to the Tom Tom Car Kit speaker

Unlock your iPhone

Click -> Settings -> General -> Bluetooth - > Turn Bluetooth on if its not already.

Connect the phone to the Tom Tom Kit while the kit is also plugged in to the cig lighter.

Now the Tom Tom Kit will show up in the discoverable devices.

Click it to connect and enter the pin 5555.

Tested on:

iOS Version: 4.3.3

Source: Link