I had an iphone 3g that I jailbroke first with Blackra1n and then later with spirit. Throughout the course of those jailbreaks The wi fi stopped working completely, and I mean completely (I'm sure there are others here who know what I mean) Restoring the phone, installing fixes and and resetting the network settings didn't bring it back. Also my notifications stopped working. Other than that it was fully functional.
So I now have an iphone 4 and I'm fearful that this may happen again and am hoping you all in this topic can ease my nerves about it, because that was one thing that wasn't reversible after my jailbreak. I also wonder if anyone may know what could've caused that.
I'm guessing Jailbreaking is slightly safer now anyway. But can this happen again?