@CuriousNoob: Several others have had the SMS reboot issues on IHO after installing the ZV9 update, but it sounds like your phone has it worse than most. It's been discussed quite a bit in LeslieAnn's radio patch thread.
As I mentioned to you a few times now, tdm posted a patch
here to put GingerKernel on MiRaGe 04/03. Since I installed it, I haven't seen a single reboot, SMS lag or other radio issues. My phone is back to being the rock that I've come to expect from MiRaGe.
I understand that you got a replacement phone from VMU, so you're back on ZV4. But if you still have the ZV9, I think it would be a helpful test for the community to see if that GingerKernel-MiRaGe 04/03 combo can stabilize it. Again if your phone had so many SMS reboots, this would help us know if GingerKernel really solves it for good or merely "improves" stability.