I started a thread in the Root Forum about this because I have it happen all the time, as does my husband with a DX. I've had this problem on multiple ROMs as well. From what I've gathered, it has to do with the radio upgrade in GB, the Froyo radio build is .07p and the GB radio build is .12p. It's the latter that is problematic. Sometimes, I'll notice that both husband's DX and mine will have the same problem at exactly the same time even though we're running different ROM's. Other times, it's one or the other phone that has the problem. But I agree, it really needs to be addressed. I have a serious medical condition that puts me at risk of dying w/o immediate medical intervention and we can't NOT be able to place a call when that happens. For the monthly fees we all pay, having a phone that's actually a working phone, is pretty much mandatory for all of us.