Running diagnostic stabilized my signal
I am on VZW and have been frustrated with the fluctuating signal bar. I hoped the newest OS would take care of the problem, but no such luck. I tried flipping over the SIM card...same thing. Did *228...same thing.
Today, I ran the diagnostic tool in the wireless connections menu and I haven't noticed it fluctuate AT ALL. In fact, I actually have 1 more bar than I previously did at home. I'm wondering if the diagnostic tool also performs an optimization. Hope others can benefit from this.