I've seen something similar on the board but I thought I'd post this anyway:
When use 4g (or 3g) data, the icon turns white quite abit and I lose the data connection. After a bit it will turn blue and reconnect. This happens when I have 4 bars of signal. When I'm on wifi, it works great. This is my 2nd Bionic and the first one didn't drop data anywhere near what I'm seeing here. Any ideas?