Quick question: I was looking at my HT286 (it registers to my asterisk system, not voipo's servers). I had the same issue as you guys, but never got into looking as to why. Here's an issue: HT286 has two ways of doing 3-way: "bell style", where you diddle the flash hook like you guys do, and the other way, where you press flash to put A on hold, dial '*23' followed by B's number, and when (if) they answer, press flash again. NOTE WELL: the default is mode 2, NOT mode 1 I haven't yet tested this (I'm at work right now), and I'm not sure you guys can (isn't the ht286 locked? do any of you have BYOD credentials and can prove/disprove my hypothesis?) If this is it, it's a simple voipo config change they can push out to you all.