I was having all kinds of trouble with my first Bold running AT&T .167, it dropped calls going from 3G to EDGE, reboots on its own and numerous battery pulls. It then started to overheat and turn itself off. AT&T replaced with new one within 30 days. Second one would drop calls. I by passed .185 and went straight to .190 and haven't had any trouble, so far so good. My two cents.