As you are not describing the steps you have taken so far, but I can imagine from experience that there have been many

, I will describe what I did below. I have a Scala Q3 paired with the bike and the iPhone. Aside from some other "nasty" side-effects (there's a separate post of mine in the forum about that plus several fellow TT-riders with similar complaints), the configuration/pairing worked for me, at least in principle. It should not really defer from installing a SMH10. I suggest that you first unpair all devices from the TT (and also between the SMH10 and the iPhone) and then start anew. Make sure that the software of your SMH10 is up to date. Not sure if the correct order of pairing is important, but here's what I did:
My first step was to pair the iPhone 5 with bluetooth as device 2 to the TT. This worked flawlessly and once the PIN-code was inserted, the TT accepted my phone just fine. Listening my playlist via bluetooth through the TT-speakers was just a matter of choosing the correct audio-input (by selecting the "M" button on the bike until "ipod" appeared). It was also no problem connecting via USB in the left-hand cockpit-compartment and getting the output on the TT-speakers.
Next I connected my Q3 to the Trophy, which was quite a hassle. It went from: device not recognized (several times) to recognized but no output on my headphones

All I can say, be patient and disconnect, reconnect as device 1 (headphones) as often as it takes. After about 5 attempts I was finally there and could listen to some music. Next I tried incoming phone-calls, which also worked immediately.
What you need to make sure is to select the correct audio-input (bluetooth or USB and "ipod") and output (front-speakers, headphone) on your TT, depending on how you are connecting your devices. In my case, I usually connect the iPhone via USB in the cockpit-compartment (left side). This way, I can listen to music from my iPhone (selecting the correct device-input i.e. "ipod") and accept and answer calls. All of it can be handled and is visible through the cockpit-display of the TT.
As you did not mention the need for communicating with a pillion, I have skipped this part.
Hope this helps.