You can buy just the Bluetooth adapter.
http://www.gromaudio.com/store/accessories/wireless-btd.html
http://www.gromaudio.com/store/accessories/wireless-btd.html
Sure, you can use it as BT handsfree. The caller's voice will be thru car speakers.
I thought he asking about BT calling feature through GROM.
Do you have SAT receiver originally in the car? If so, you can't connect it back onto the radio.
From I remember back when I was using their earlier version and experiencing this "no sat" problem, their support had me connected the red power to constant power instead of wire is energized when the car is running. Try to tap into the clock power wire instead.
Resume play works great. I have a bluetooth app that opens and slacker radio when the car starts.
Sent from my SCH-I545
---------- Post added at 10:39 AM ---------- Previous post was at 10:36 AM ----------
BTW I was using a direct auxiliary connection through the rear media prior to this and the volume level was much weaker compared to the grom. Grom volume is great. At least with the s4.
Sent from my SCH-I545