Ok didn't know 3100 would not work. My QA department always teases us with the saying "now *WE* know" .

Just be aware with 3500 the memory error may sneak up on you and is slow to reconnect to headset from sleep.

I'm wondering if the thread on the back log of Events is what is eventually messing up some folks BT. And Maybe the hard reset is what is clearing them out. Then they queue up again and break the BT Stack again.