I have never tried anything other than my Sena SMH10 with mine, but a number of forum members have the latest bluetooth (4.+) connected to the Trophy with good results. Some specific bluetooth systems/models have had issues pairing to the Trophy, but with the Sena's it has been a firmware solution that Sena has just recently solved. Your phone shouldn't be an issue, but you won't be able to make outgoing calls by voice command with it paired to the Trophy since cannot accept input from your mic into the audio system. You should be able to answer OK. If your U Clear can pair to 2 devices a better option would be to pair the phone to your headset, and pair the headset to the Trophy as headset 1, then you can have the Trophy audio and have voice activation for the phone to make and receive calls. It does take some trial and error to find out what works best for you. Some U Clear users on the forum may be able to help you more, or you can try to find a FAQ on the U Clear website that will answer your questions.