I have been having the same issue. I live in Indianapolis. I was out of town from June 5th until June 10th, and I had 4G disabled for the duration of the trip. I got the 905 update on June 8th and applied it with no problems. The phone worked fine until I got home on June 10th and enabled 4G at the airport. On my cab ride home, I noticed that the 4G signal was much better (3-4 bars) but the indicator kept changing from blue to white (still with full signal) and the data would disconnect. This problem has been happening intermittently since then. The last week or so has been especially bad with the issue occurring almost every day, sometimes multiple times per day.  I'm not sure if there was something wrong with the Bionic update or if Verizon broke something while I was out of town, but 4G worked a lot better before June 5th despite displaying a slightly lower signal on my Bionic. Right now it's functioning badly enough that I don't really consider it usable.