I dont have a schmart phone and what I do is BT the phone to the GPS , then the GPS to the Sena , my music is on a SD card in the GPS ..
I got mine from revzilla , there are two mounting options , one clamps to the helmet , the other is a sticky back . I have a Nolan N104 that I was hoping to use it on and the sticky is what I would have had to use , I tried the sticky and it doesn't werk for crap , and they even recommend not using it .. Also I ordered the set with the boom mike , no go on the full or modular , and the big earpieces won't werk in the Nolan , but alas , they have several different models of mike and earpiece setups ..
If you have the modular or FF , there is a model with earbuds and a mike that mounts inside the helmet ..
Wanna use it on more than one helmet ?? You can buy the mike kits without the power unit for around 30 bux , and just move the power unit from helmet to helmet .
I mounted mine on a 3/4 skid lid and the intercom werks good between two bikes , we did a road trip two weeks ago and the intercom did great , long as it is strait line , we were about 200' apart going around a curve and it broke up because of the trees .. Music sounds so so , but hey I don't need concert quality ..
So Many Highways So Little Time