Try this it works on my driod razer 4.0 that couldnt ever connect! Plug the cable in to the phone and click the apps button on the radio screen it will prompt you with a selection of bt settings or ok hit bt settings then press connections you should see your phone listed there press it to start the connection process. On your phone you will be propmted to allow app radio access to your phonebook or missed calls quickly hit cancel to that! Wait then it will prompt for a pair again on your phone but this time with a random numbers and a message saying somthing like confirm the numbers match d