My Bell 8130 does the same thing after a software upgrade or a wipe. I don't exactly know what fixes it but it does again away after a short period of time (at least on my phone). My best guess is either the memory management is poor and somehow it fixes itself or that paring a couple of headsets and a laptop to it. Those are really my only two guess - and they are both pretty poor imo. I am pretty sure there are others that have posted the same problem if you do a search for phone hangs or something close to that.